A few example CMV files can be found in the data/initial_movies folder
of Dwarf Fortress (http://www.bay12games.com/dwarves/).

The demuxer does not currently handle audio cues. There are warning
messages logged for each audio file that should be played. As far as I
know, the only two existing CMV files with audio cues in them are in the
examples folder mentioned above.

(Reformatted to hopefully make the patch not break in GMail's weird
forced word wrapping)

Signed-off-by: Ben Lubar <b...@lubar.me>
---
 Changelog                |    1 +
 configure                |    1 +
 doc/general.texi         |    2 +
 libavcodec/Makefile      |    1 +
 libavcodec/allcodecs.c   |    1 +
 libavcodec/avcodec.h     |    1 +
 libavcodec/codec_desc.c  |    7 +
 libavcodec/dfcmv.c       | 1133 ++++++++++++++++++++++++++++++++++++++
 libavcodec/version.h     |    4 +-
 libavformat/Makefile     |    1 +
 libavformat/allformats.c |    1 +
 libavformat/dfcmv.c      |  232 ++++++++
 libavformat/version.h    |    2 +-
 13 files changed, 1384 insertions(+), 3 deletions(-)
 create mode 100644 libavcodec/dfcmv.c
 create mode 100644 libavformat/dfcmv.c

diff --git a/Changelog b/Changelog
index f30f398a9f..eed4fa8a50 100644
--- a/Changelog
+++ b/Changelog
@@ -27,6 +27,7 @@ version <next>:
 - axcorrelate filter
 - mvdv decoder
 - mvha decoder
+- Dwarf Fortress CMV demuxer and decoder


 version 4.2:
diff --git a/configure b/configure
index ca7137f341..622deed689 100755
--- a/configure
+++ b/configure
@@ -3258,6 +3258,7 @@ caf_demuxer_select="iso_media riffdec"
 caf_muxer_select="iso_media"
 dash_muxer_select="mp4_muxer"
 dash_demuxer_deps="libxml2"
+dfcmv_demuxer_deps="zlib"
 dirac_demuxer_select="dirac_parser"
 dts_demuxer_select="dca_parser"
 dtshd_demuxer_select="dca_parser"
diff --git a/doc/general.texi b/doc/general.texi
index a5b77e0de1..bbc90a2f58 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -429,6 +429,7 @@ library:
     @tab Video format used by CD+G karaoke disks
 @item Phantom Cine              @tab   @tab X
 @item Cineform HD               @tab   @tab X
+@item Dwarf Fortress Curses MoVie (.cmv files)  @tab   @tab X
 @item Commodore CDXL            @tab   @tab X
     @tab Amiga CD video format
 @item Core Audio Format         @tab X @tab X
@@ -843,6 +844,7 @@ following image formats are supported:
 @item Delphine Software International CIN video  @tab     @tab  X
     @tab Codec used in Delphine Software International games.
 @item Discworld II BMV Video @tab     @tab  X
+@item Dwarf Fortess Curses MoVie (CMV)  @tab     @tab  X
 @item Canopus Lossless Codec @tab     @tab  X
 @item Cinepak                @tab     @tab  X
 @item Cirrus Logic AccuPak   @tab  X  @tab  X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c1f35b40d8..24e146e90f 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -267,6 +267,7 @@ OBJS-$(CONFIG_DDS_DECODER)             += dds.o
 OBJS-$(CONFIG_DIRAC_DECODER)           += diracdec.o dirac.o
diracdsp.o diractab.o \
                                           dirac_arith.o dirac_dwt.o dirac_vlc.o
 OBJS-$(CONFIG_DFA_DECODER)             += dfa.o
+OBJS-$(CONFIG_DFCMV_DECODER)           += dfcmv.o
 OBJS-$(CONFIG_DNXHD_DECODER)           += dnxhddec.o dnxhddata.o
 OBJS-$(CONFIG_DNXHD_ENCODER)           += dnxhdenc.o dnxhddata.o
 OBJS-$(CONFIG_DOLBY_E_DECODER)         += dolby_e.o kbdwin.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index c33edf23c9..8571cce906 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -83,6 +83,7 @@ extern AVCodec ff_cscd_decoder;
 extern AVCodec ff_cyuv_decoder;
 extern AVCodec ff_dds_decoder;
 extern AVCodec ff_dfa_decoder;
+extern AVCodec ff_dfcmv_decoder;
 extern AVCodec ff_dirac_decoder;
 extern AVCodec ff_dnxhd_encoder;
 extern AVCodec ff_dnxhd_decoder;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 735a3c2d76..bd0446fe92 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -410,6 +410,7 @@ enum AVCodecID {
     AV_CODEC_ID_SCREENPRESSO,
     AV_CODEC_ID_RSCC,
     AV_CODEC_ID_AVS2,
+    AV_CODEC_ID_DFCMV,

     AV_CODEC_ID_Y41P = 0x8000,
     AV_CODEC_ID_AVRP,
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 570bd2f382..4ce8416b8e 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1403,6 +1403,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("AVS2-P2/IEEE1857.4"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_DFCMV,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "dfcmv",
+        .long_name = NULL_IF_CONFIG_SMALL("Dwarf Fortress Curses MoVie"),
+        .props     = AV_CODEC_PROP_INTRA_ONLY,
+    },
     {
         .id        = AV_CODEC_ID_Y41P,
         .type      = AVMEDIA_TYPE_VIDEO,
diff --git a/libavcodec/dfcmv.c b/libavcodec/dfcmv.c
new file mode 100644
index 0000000000..9a1f4ac4d8
--- /dev/null
+++ b/libavcodec/dfcmv.c
@@ -0,0 +1,1133 @@
+#include "avcodec.h"
+#include "internal.h"
+#include "thread.h"
+#include "libavutil/imgutils.h"
+
+typedef struct DFCMVCodecContext {
+    uint32_t width, height;
+    uint32_t half_frame_size;
+    uint32_t frame_size;
+} DFCMVCodecContext;
+
+static av_cold int dfcmv_init_decoder(AVCodecContext *avctx) {
+    DFCMVCodecContext *cmv = avctx->priv_data;
+    int ret;
+
+    ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
+    if (ret < 0) {
+        return ret;
+    }
+
+    cmv->width = avctx->width / 10;
+    cmv->height = avctx->height / 12;
+    cmv->half_frame_size = cmv->width * cmv->height;
+    cmv->frame_size = 2 * cmv->half_frame_size;
+    avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+    return 0;
+}
+
+static const uint32_t dfcmv_palette[32] = {
+    0xff000000, 0xff000080, 0xff008000, 0xff008080,
+    0xff800000, 0xff800080, 0xff808000, 0xffc0c0c0,
+    0xff808080, 0xff0000ff, 0xff00ff00, 0xff00ffff,
+    0xffff0000, 0xffff00ff, 0xffffff00, 0xffffffff,
+    0xff000000, 0xff000060, 0xff006000, 0xff006060,
+    0xff600000, 0xff600060, 0xff606000, 0xff909090,
+    0xff606060, 0xff0000c0, 0xff00c000, 0xff00c0c0,
+    0xffc00000, 0xffc000c0, 0xffc0c000, 0xffc0c0c0,
+};
+
+// 2 bpp, palette = bg,fg,fg_faded,unused; 10x12 pixels per sprite;
+// padded by 12 bits per row to 32 bits
+static const uint32_t dfcmv_sprites[256][12] = {
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005550, 0x010004, 0x010004, 0x011044, 0x020008,
+        0x02aaa8, 0x028528, 0x02aaa8, 0x00aaa0, 0x002a00, 0x002800,
+    },
+    {
+        0x000000, 0x005550, 0x015554, 0x015554, 0x014514, 0x025558,
+        0x02aaa8, 0x029068, 0x02aaa8, 0x00aaa0, 0x002a00, 0x002800,
+    },
+    {
+        0x000000, 0x000000, 0x001010, 0x005454, 0x005554, 0x005554,
+        0x005554, 0x001550, 0x000540, 0x000100, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000100, 0x000540, 0x001550, 0x005554, 0x005554,
+        0x001550, 0x000540, 0x000100, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x001540, 0x001540, 0x015554, 0x015054,
+        0x015054, 0x000500, 0x000500, 0x005550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x001540, 0x005550, 0x015554, 0x015554,
+        0x005550, 0x000500, 0x000500, 0x005550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x001540, 0x005550,
+        0x005550, 0x001540, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x055555, 0x055555, 0x055555, 0x055555, 0x054015, 0x050005,
+        0x050005, 0x054015, 0x055555, 0x055555, 0x055555, 0x055555,
+    },
+    {
+        0x000000, 0x000000, 0x001540, 0x005550, 0x005050, 0x004010,
+        0x004010, 0x005050, 0x005550, 0x001540, 0x000000, 0x000000,
+    },
+    {
+        0x055555, 0x055555, 0x054015, 0x050005, 0x050505, 0x051545,
+        0x051545, 0x050505, 0x050005, 0x054015, 0x055555, 0x055555,
+    },
+    {
+        0x000000, 0x005540, 0x005400, 0x004540, 0x004150, 0x000554,
+        0x001414, 0x001414, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x005050, 0x005050, 0x005050, 0x001540,
+        0x000500, 0x005550, 0x000500, 0x000500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x015500, 0x010500, 0x010500, 0x015500, 0x000500,
+        0x000500, 0x000550, 0x000554, 0x000150, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x015550, 0x014050, 0x015550, 0x014050, 0x014050,
+        0x014050, 0x015050, 0x015054, 0x005054, 0x000014, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000500, 0x014514, 0x005550, 0x015054,
+        0x015054, 0x005550, 0x014514, 0x000500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000004, 0x000014, 0x000054, 0x000554, 0x005554,
+        0x000554, 0x000054, 0x000014, 0x000004, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x004000, 0x005000, 0x005400, 0x005540, 0x005554,
+        0x005540, 0x005400, 0x005000, 0x004000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x001540, 0x005550, 0x000500, 0x000500,
+        0x000500, 0x005550, 0x001540, 0x000500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+        0x000000, 0x000000, 0x005050, 0x005050, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x015550, 0x014514, 0x014514, 0x014514, 0x014550,
+        0x014500, 0x014500, 0x014500, 0x014500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005550, 0x014050, 0x000140, 0x001540, 0x005050,
+        0x005050, 0x001540, 0x001400, 0x005014, 0x005550, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x005554, 0x005554, 0x005554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x001540, 0x005550, 0x000500, 0x000500,
+        0x000500, 0x005550, 0x001540, 0x000500, 0x005550, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x001540, 0x005550, 0x000500, 0x000500,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+        0x000500, 0x005550, 0x001540, 0x000500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000500, 0x001400, 0x005554,
+        0x001400, 0x000500, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000140, 0x000050, 0x005554,
+        0x000050, 0x000140, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000014, 0x000014,
+        0x000014, 0x005554, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x001040, 0x005050, 0x015554,
+        0x005050, 0x001040, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000100, 0x000100, 0x000540, 0x000540,
+        0x001550, 0x001550, 0x005554, 0x005554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x005554, 0x005554, 0x001550, 0x001550,
+        0x000540, 0x000540, 0x000100, 0x000100, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000140, 0x000550, 0x000550, 0x000550, 0x000140,
+        0x000140, 0x000000, 0x000140, 0x000140, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005050, 0x005050, 0x005050, 0x001040, 0x000000,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001450, 0x001450, 0x005554, 0x001450, 0x001450,
+        0x001450, 0x005554, 0x001450, 0x001450, 0x000000, 0x000000,
+    },
+    {
+        0x000140, 0x000140, 0x001550, 0x000014, 0x000014, 0x000550,
+        0x001400, 0x001400, 0x000554, 0x000140, 0x000140, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x001014, 0x001414, 0x000500,
+        0x000140, 0x000050, 0x001414, 0x001404, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000150, 0x000514, 0x000514, 0x000150, 0x004554,
+        0x005514, 0x001414, 0x001514, 0x005150, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000140, 0x000140, 0x000140, 0x000050, 0x000000,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001400, 0x000500, 0x000140, 0x000050, 0x000050,
+        0x000050, 0x000140, 0x000500, 0x001400, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000050, 0x000140, 0x000500, 0x001400, 0x001400,
+        0x001400, 0x000500, 0x000140, 0x000050, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x005050, 0x001540, 0x015554,
+        0x001540, 0x005050, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000500, 0x000500, 0x005550,
+        0x000500, 0x000500, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x000000, 0x000540, 0x000540, 0x000050, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x005555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x000000, 0x000540, 0x000540, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x004000, 0x005000, 0x001400, 0x000500,
+        0x000140, 0x000050, 0x000014, 0x000004, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001550, 0x005014, 0x005414, 0x005514, 0x005114,
+        0x005154, 0x005054, 0x005014, 0x001550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000100, 0x000140, 0x000154, 0x000140, 0x000140,
+        0x000140, 0x000140, 0x000140, 0x001554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001414, 0x001400, 0x000500,
+        0x000140, 0x000050, 0x001414, 0x001554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001400, 0x001400, 0x000540,
+        0x001400, 0x001400, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001400, 0x001500, 0x001540, 0x001450, 0x001414,
+        0x005554, 0x001400, 0x001400, 0x005500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001554, 0x000014, 0x000014, 0x000014, 0x000554,
+        0x001400, 0x001400, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000540, 0x000050, 0x000014, 0x000014, 0x000554,
+        0x001414, 0x001414, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005554, 0x005014, 0x005014, 0x005000, 0x001400,
+        0x000500, 0x000140, 0x000140, 0x000140, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001414, 0x001454, 0x000550,
+        0x001514, 0x001414, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001414, 0x001414, 0x001550,
+        0x000500, 0x000500, 0x000140, 0x000150, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000540, 0x000540, 0x000000,
+        0x000000, 0x000540, 0x000540, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000540, 0x000540, 0x000000,
+        0x000000, 0x000540, 0x000540, 0x000500, 0x000140, 0x000000,
+    },
+    {
+        0x000000, 0x001400, 0x000500, 0x000140, 0x000050, 0x000014,
+        0x000050, 0x000140, 0x000500, 0x001400, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005550, 0x000000,
+        0x005550, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000050, 0x000140, 0x000500, 0x001400, 0x005000,
+        0x001400, 0x000500, 0x000140, 0x000050, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001400, 0x000500, 0x000140,
+        0x000140, 0x000000, 0x000140, 0x000140, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001550, 0x005014, 0x005014, 0x005514, 0x005514,
+        0x005514, 0x000014, 0x000014, 0x001550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000140, 0x000550, 0x001414, 0x001414, 0x001414,
+        0x001554, 0x001414, 0x001414, 0x001414, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001554, 0x005050, 0x005050, 0x005050, 0x001550,
+        0x005050, 0x005050, 0x005050, 0x001554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x005050, 0x005014, 0x000014, 0x000014,
+        0x000014, 0x005014, 0x005050, 0x001540, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000554, 0x001450, 0x005050, 0x005050, 0x005050,
+        0x005050, 0x005050, 0x001450, 0x000554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005554, 0x004050, 0x000050, 0x001050, 0x001550,
+        0x001050, 0x000050, 0x004050, 0x005554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005554, 0x005050, 0x004050, 0x001050, 0x001550,
+        0x001050, 0x000050, 0x000050, 0x000154, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x005050, 0x005014, 0x000014, 0x000014,
+        0x005414, 0x005014, 0x005050, 0x005540, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001414, 0x001414, 0x001414, 0x001414, 0x001554,
+        0x001414, 0x001414, 0x001414, 0x001414, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x000140, 0x000140, 0x000140, 0x000140,
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+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005055,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x005555,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000555, 0x000500,
+        0x000500, 0x000555, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005055, 0x005000,
+        0x005000, 0x005055, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005555, 0x005000,
+        0x005000, 0x005055, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005055, 0x005000,
+        0x005000, 0x005555, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000555, 0x000500,
+        0x000500, 0x000555, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000555,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x055500,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x055555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x055555,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x055500,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x055555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x055555,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x055500, 0x000500,
+        0x000500, 0x055500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x055050,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x055050, 0x000050,
+        0x000050, 0x055550, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x055550, 0x000050,
+        0x000050, 0x055050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x055055, 0x000000,
+        0x000000, 0x055555, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x055555, 0x000000,
+        0x000000, 0x055055, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x055050, 0x000050,
+        0x000050, 0x055050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x055555, 0x000000,
+        0x000000, 0x055555, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x055055, 0x000000,
+        0x000000, 0x055055, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x015555, 0x000000,
+        0x000000, 0x015555, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x055555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x055555, 0x000000,
+        0x000000, 0x055555, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x055555,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x055550,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x055500, 0x000500,
+        0x000500, 0x055500, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x055500, 0x000500,
+        0x000500, 0x055500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x055550,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x055055,
+        0x005050, 0x005050, 0x005050, 0x005050, 0x005050, 0x005050,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x055555, 0x000000,
+        0x000000, 0x055555, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x055500,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x055555, 0x055555, 0x055555, 0x055555, 0x055555, 0x055555,
+        0x055555, 0x055555, 0x055555, 0x055555, 0x055555, 0x055555,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x055555, 0x055555, 0x055555, 0x055555, 0x055555, 0x055555,
+    },
+    {
+        0x000555, 0x000555, 0x000555, 0x000555, 0x000555, 0x000555,
+        0x000555, 0x000555, 0x000555, 0x000555, 0x000555, 0x000555,
+    },
+    {
+        0x055400, 0x055400, 0x055400, 0x055400, 0x055400, 0x055400,
+        0x055400, 0x055400, 0x055400, 0x055400, 0x055400, 0x055400,
+    },
+    {
+        0x055555, 0x055555, 0x055555, 0x055555, 0x055555, 0x055555,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005150, 0x005514,
+        0x001414, 0x001414, 0x005514, 0x005150, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000550, 0x001414, 0x001414, 0x000514, 0x001414,
+        0x001414, 0x001414, 0x000554, 0x000014, 0x000050, 0x000000,
+    },
+    {
+        0x000000, 0x001554, 0x001414, 0x001414, 0x000014, 0x000014,
+        0x000014, 0x000014, 0x000014, 0x000014, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005554, 0x001450, 0x001450, 0x001450, 0x001450,
+        0x001450, 0x001450, 0x001450, 0x005050, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001554, 0x001014, 0x001050, 0x000050, 0x000140,
+        0x000050, 0x001050, 0x001014, 0x001554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005550, 0x000414,
+        0x001414, 0x001414, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005050, 0x005050,
+        0x005050, 0x005050, 0x005050, 0x014550, 0x000050, 0x000014,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x005150, 0x001514, 0x000500,
+        0x000500, 0x000500, 0x000500, 0x005400, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001554, 0x000140, 0x000550, 0x001414, 0x001414,
+        0x001414, 0x000550, 0x000140, 0x001554, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001550, 0x005014, 0x005014, 0x005014, 0x005554,
+        0x005014, 0x005014, 0x005014, 0x001550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005550, 0x014014, 0x014014, 0x014014, 0x014014,
+        0x005050, 0x005050, 0x005050, 0x015054, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x000050, 0x000140, 0x000550, 0x001414,
+        0x001414, 0x001414, 0x001414, 0x000550, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x005150, 0x014514, 0x014514,
+        0x014514, 0x005450, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x005000, 0x001550, 0x005514, 0x005114,
+        0x005154, 0x001550, 0x000014, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x000050, 0x000014, 0x000014, 0x001554,
+        0x000014, 0x000014, 0x000050, 0x001540, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000550, 0x001414, 0x001414, 0x001414,
+        0x001414, 0x001414, 0x001414, 0x001414, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x001554, 0x000000, 0x000000, 0x001554,
+        0x000000, 0x000000, 0x001554, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000140, 0x000140, 0x001554, 0x000140,
+        0x000140, 0x000000, 0x001554, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000050, 0x000140, 0x000500, 0x000500, 0x000140,
+        0x000050, 0x000000, 0x001554, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000500, 0x000140, 0x000050, 0x000050, 0x000140,
+        0x000500, 0x000000, 0x001554, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x005400, 0x014500, 0x014500, 0x000500,
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+    },
+    {
+        0x000500, 0x000500, 0x000500, 0x000500, 0x000500, 0x000500,
+        0x000500, 0x000514, 0x000514, 0x000150, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000140, 0x000140, 0x000000, 0x001554,
+        0x000000, 0x000140, 0x000140, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x014150, 0x014514, 0x005414, 0x000000,
+        0x014150, 0x014514, 0x005414, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x005500, 0x014140, 0x014140, 0x014140, 0x005500,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x005400, 0x005400,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x001400,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x054000, 0x004000, 0x004000, 0x004000, 0x004040,
+        0x004140, 0x004500, 0x005400, 0x005000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001450, 0x005140, 0x005140, 0x005140, 0x005140,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x001540, 0x005000, 0x001400, 0x000500, 0x005540,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x005500, 0x005500, 0x005500, 0x005500,
+        0x005500, 0x005500, 0x005500, 0x005500, 0x000000, 0x000000,
+    },
+    {
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+        0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
+    },
+};
+
+static av_cold int dfcmv_close_decoder(AVCodecContext *avctx) {
+    return 0;
+}
+
+static int dfcmv_decode(AVCodecContext *avctx, void *data,
+        int *got_frame, AVPacket *avpkt) {
+    DFCMVCodecContext *cmv = avctx->priv_data;
+    ThreadFrame frame = { .f = data };
+    AVFrame *p = data;
+    uint8_t attr;
+    uint8_t sprite_id;
+    uint32_t sprite_row;
+    uint8_t palette[3];
+    uint32_t frame_idx;
+    int ret;
+    int x, y, x0, y0, x1, y1;
+
+    if (avpkt->size < cmv->frame_size) {
+        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
+        return ret;
+    }
+
+    for (y = 0; y < cmv->height; y++) {
+        y0 = y * 12;
+        for (x = 0; x < cmv->width; x++) {
+            x0 = x * 10;
+            attr = avpkt->data[cmv->half_frame_size + x * cmv->height + y];
+            palette[0] = (attr >> 3) & 7;
+            palette[1] = (attr & 7) | ((attr >> 3) & (1 << 3));
+            palette[2] = palette[1] + 16;
+
+            for (y1 = 0; y1 < 12; y1++) {
+                sprite_id = avpkt->data[x * cmv->height + y];
+                sprite_row = dfcmv_sprites[sprite_id][y1];
+                for (x1 = 0; x1 < 10; x1++) {
+                    frame_idx = (x0 + x1) + (y0 + y1) * p->linesize[0];
+                    p->data[0][frame_idx] = palette[sprite_row & 3];
+                    sprite_row = sprite_row >> 2;
+                }
+            }
+        }
+    }
+    memcpy(p->data[1], dfcmv_palette, sizeof(dfcmv_palette));
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+    *got_frame = 1;
+
+    return cmv->frame_size;
+}
+
+AVCodec ff_dfcmv_decoder = {
+    .name           = "dfcmv",
+    .long_name      = NULL_IF_CONFIG_SMALL("Dwarf Fortress Curses MoVie"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_DFCMV,
+    .priv_data_size = sizeof(DFCMVCodecContext),
+    .init           = dfcmv_init_decoder,
+    .close          = dfcmv_close_decoder,
+    .decode         = dfcmv_decode,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 8b9c27378c..94bcbae2d6 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
 #include "libavutil/version.h"

 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  64
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR  65
+#define LIBAVCODEC_VERSION_MICRO 100

 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 52f29b1a6d..5850ff3b1c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -149,6 +149,7 @@ OBJS-$(CONFIG_DAUD_DEMUXER)              += dauddec.o
 OBJS-$(CONFIG_DAUD_MUXER)                += daudenc.o
 OBJS-$(CONFIG_DCSTR_DEMUXER)             += dcstr.o
 OBJS-$(CONFIG_DFA_DEMUXER)               += dfa.o
+OBJS-$(CONFIG_DFCMV_DEMUXER)             += dfcmv.o
 OBJS-$(CONFIG_DHAV_DEMUXER)              += dhav.o
 OBJS-$(CONFIG_DIRAC_DEMUXER)             += diracdec.o rawdec.o
 OBJS-$(CONFIG_DIRAC_MUXER)               += rawenc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index ff9bdb906f..f2668ded74 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -111,6 +111,7 @@ extern AVInputFormat  ff_daud_demuxer;
 extern AVOutputFormat ff_daud_muxer;
 extern AVInputFormat  ff_dcstr_demuxer;
 extern AVInputFormat  ff_dfa_demuxer;
+extern AVInputFormat  ff_dfcmv_demuxer;
 extern AVInputFormat  ff_dhav_demuxer;
 extern AVInputFormat  ff_dirac_demuxer;
 extern AVOutputFormat ff_dirac_muxer;
diff --git a/libavformat/dfcmv.c b/libavformat/dfcmv.c
new file mode 100644
index 0000000000..0e8e465b0e
--- /dev/null
+++ b/libavformat/dfcmv.c
@@ -0,0 +1,232 @@
+#include <zlib.h>
+#include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define DFCMV_VERSION_0 10000
+#define DFCMV_VERSION_1 10001
+
+typedef struct DFCMVContext {
+    int64_t total_frames;
+    uint32_t frame_size;
+    AVBufferRef *buffered_frames;
+    int buf_start, buf_end;
+} DFCMVContext;
+
+static int dfcmv_probe(const AVProbeData *p)
+{
+    if (AV_RL32(p->buf) == DFCMV_VERSION_0 ||
+            AV_RL32(p->buf) == DFCMV_VERSION_1) {
+        return AVPROBE_SCORE_MAX;
+    }
+
+    return 0;
+}
+
+static int dfcmv_read_header(AVFormatContext *s)
+{
+    int i, j;
+    uint32_t version;
+    uint32_t columns, rows;
+    uint32_t delay_rate;
+    uint32_t sound_count;
+    uint8_t *sound_names;
+    uint32_t sound_timing[200][16];
+    AVStream *st;
+    DFCMVContext *cmv = s->priv_data;
+    AVIOContext *pb = s->pb;
+
+    version = avio_rl32(pb);
+    if (version != DFCMV_VERSION_0 && version != DFCMV_VERSION_1) {
+        av_log(s, AV_LOG_ERROR, "cmv file has invalid version number %u\n",
+                version);
+        return AVERROR_INVALIDDATA;
+    }
+
+    columns = avio_rl32(pb);
+    rows = avio_rl32(pb);
+    if (columns == 0 || rows == 0) {
+        av_log(s, AV_LOG_ERROR, "cmv file has invalid size %ux%u\n",
+                columns, rows);
+        return AVERROR_INVALIDDATA;
+    }
+    cmv->frame_size = columns * rows * 2;
+
+    delay_rate = avio_rl32(pb);
+    if (delay_rate == 0) {
+        av_log(s, AV_LOG_WARNING, "cmv file claims to have infinite"
+                " frames per second; assuming 50 frames per second\n");
+        delay_rate = 2;
+    }
+
+    st = avformat_new_stream(s, NULL);
+    if (!st) {
+        return AVERROR(ENOMEM);
+    }
+    avpriv_set_pts_info(st, 64, delay_rate, 100);
+    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codecpar->codec_id = AV_CODEC_ID_DFCMV;
+    st->codecpar->width = columns * 10;
+    st->codecpar->height = rows * 12;
+    st->start_time = 0;
+
+    if (version >= DFCMV_VERSION_1) {
+        sound_count = avio_rl32(pb);
+
+        sound_names = av_calloc(sound_count, 50);
+        if (!sound_names) {
+            return AVERROR(ENOMEM);
+        }
+
+        if (avio_read(pb, sound_names, sound_count * 50)
+                != sound_count * 50) {
+            av_free(sound_names);
+            return AVERROR(EIO);
+        }
+
+        if (avio_read(pb, (uint8_t *)sound_timing, 4 * 200 * 16)
+                != 4 * 200 * 16) {
+            av_free(sound_names);
+            return AVERROR(EIO);
+        }
+
+        for (i = 0; i < sound_count; i++) {
+            if (!sound_names[50 * i]) {
+                av_free(sound_names);
+                av_log(s, AV_LOG_WARNING, "cmv file contains"
+                        " empty sound name\n");
+                return AVERROR_INVALIDDATA;
+            }
+            if (av_strnlen(&sound_names[50 * i], 50) == 50) {
+                av_free(sound_names);
+                av_log(s, AV_LOG_WARNING, "cmv file contains"
+                        " unterminated sound name\n");
+                return AVERROR_INVALIDDATA;
+            }
+        }
+
+        for (i = 0; i < 200; i++) {
+            for (j = 0; j < 16; j++) {
+                if (sound_timing[i][j] < sound_count) {
+                    av_log(s, AV_LOG_WARNING, "cmv: todo: play sound"
+                            " %s at frame %d (channel %d)\n",
+                            &sound_names[50 * sound_timing[i][j]], i, j);
+                }
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int dfcmv_load_chunk(AVFormatContext *s) {
+    int ret;
+    int64_t pos;
+    uint32_t compressed_size, max_size;
+    DFCMVContext *cmv = s->priv_data;
+    AVIOContext *pb = s->pb;
+    AVBufferRef *buf;
+    z_stream zstream = { 0 };
+
+    pos = avio_tell(pb);
+
+    compressed_size = avio_rl32(pb);
+
+    if (avio_feof(pb)) {
+        return avio_tell(pb) == pos ? AVERROR_EOF : AVERROR(EIO);
+    }
+
+    max_size = cmv->frame_size * 200;
+
+    cmv->buffered_frames = av_buffer_alloc(max_size);
+    if (!cmv->buffered_frames) {
+        return AVERROR(ENOMEM);
+    }
+
+    buf = av_buffer_alloc(compressed_size);
+    if (!buf) {
+        return AVERROR(ENOMEM);
+    }
+
+    if (avio_read(pb, buf->data, compressed_size) != compressed_size) {
+        av_buffer_unref(&buf);
+        return AVERROR(EIO);
+    }
+
+    if (inflateInit(&zstream) != Z_OK) {
+        av_buffer_unref(&buf);
+        return -1;
+    }
+
+    zstream.next_in = buf->data;
+    zstream.avail_in = buf->size;
+    zstream.next_out = cmv->buffered_frames->data;
+    zstream.avail_out = max_size;
+
+    ret = inflate(&zstream, Z_FINISH);
+
+    inflateEnd(&zstream);
+    av_buffer_unref(&buf);
+
+    if (ret != Z_STREAM_END || zstream.avail_out % cmv->frame_size != 0) {
+        return -1;
+    }
+
+    cmv->buf_start = 0;
+    cmv->buf_end = (max_size - zstream.avail_out) / cmv->frame_size;
+
+    if (cmv->buf_end == 0) {
+        return -1;
+    }
+
+    return 0;
+}
+
+static int dfcmv_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    DFCMVContext *cmv = s->priv_data;
+    int ret;
+
+    if (cmv->buf_start == cmv->buf_end) {
+        av_buffer_unref(&cmv->buffered_frames);
+
+        if ((ret = dfcmv_load_chunk(s)) < 0) {
+            return ret;
+        }
+    }
+
+    av_init_packet(pkt);
+    pkt->buf = av_buffer_ref(cmv->buffered_frames);
+    if (!pkt->buf) {
+        return AVERROR(ENOMEM);
+    }
+    pkt->data = pkt->buf->data + (cmv->frame_size * cmv->buf_start);
+    pkt->size = cmv->frame_size;
+    pkt->pts = cmv->total_frames;
+    pkt->duration = 0;
+    cmv->total_frames++;
+    cmv->buf_start++;
+
+    return 0;
+}
+
+static int dfcmv_close(AVFormatContext *s)
+{
+    DFCMVContext *cmv = s->priv_data;
+
+    av_buffer_unref(&cmv->buffered_frames);
+
+    return 0;
+}
+
+AVInputFormat ff_dfcmv_demuxer = {
+    .name           = "dfcmv",
+    .long_name      = NULL_IF_CONFIG_SMALL("Dwarf Fortress Curses MoVie"),
+    .priv_data_size = sizeof(DFCMVContext),
+    .read_probe     = dfcmv_probe,
+    .read_header    = dfcmv_read_header,
+    .read_packet    = dfcmv_read_packet,
+    .read_close     = dfcmv_close,
+    .extensions     = "cmv",
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index bac54aed9d..f72fb9478a 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,7 +32,7 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  58
-#define LIBAVFORMAT_VERSION_MINOR  35
+#define LIBAVFORMAT_VERSION_MINOR  36
 #define LIBAVFORMAT_VERSION_MICRO 100

 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
-- 
2.24.0
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