According to spec, vp9 should support dynamic resolution changes. Add dynamic resolution encoding support in libvpx-vp9, and flush encoders when resolution change happens.
Format change should also be supported, but I didn't test it so just leave it open. cmdline: ffmpeg -noautoscale -y -i ./reinit-large_420_8-to-small_420_8.h264 -pix_fmt yuv420p -c:v libvpx-vp9 lena.ivf Signed-off-by: Linjie Fu <linjie...@intel.com> --- fftools/ffmpeg.c | 9 +++++++++ libavcodec/libvpxenc.c | 9 +++++++++ 2 files changed, 18 insertions(+) diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c index 5d52430..e091117 100644 --- a/fftools/ffmpeg.c +++ b/fftools/ffmpeg.c @@ -64,6 +64,7 @@ #include "libavutil/thread.h" #include "libavutil/threadmessage.h" #include "libavcodec/mathops.h" +#include "libavcodec/internal.h" #include "libavformat/os_support.h" # include "libavfilter/avfilter.h" @@ -130,6 +131,7 @@ static void do_video_stats(OutputStream *ost, int frame_size); static BenchmarkTimeStamps get_benchmark_time_stamps(void); static int64_t getmaxrss(void); static int ifilter_has_all_input_formats(FilterGraph *fg); +static void flush_encoders(void); static int run_as_daemon = 0; static int nb_frames_dup = 0; @@ -1067,6 +1069,13 @@ static void do_video_out(OutputFile *of, InputStream *ist = NULL; AVFilterContext *filter = ost->filter->filter; + /* flush encoders in dynamic resolution encode */ + if (next_picture && (enc->width != next_picture->width || + enc->height != next_picture->height)) { + flush_encoders(); + enc->internal->draining = 0; + } + if (ost->source_index >= 0) ist = input_streams[ost->source_index]; diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c index feb52ea..54ac365 100644 --- a/libavcodec/libvpxenc.c +++ b/libavcodec/libvpxenc.c @@ -1067,6 +1067,15 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt, int res, coded_size; vpx_enc_frame_flags_t flags = 0; + if (frame && (avctx->width != frame->width || + avctx->height != frame->height)) { + avctx->width = frame->width; + avctx->height = frame->height; + + avctx->codec->close(avctx); + avctx->codec->init(avctx); + } + if (frame) { rawimg = &ctx->rawimg; rawimg->planes[VPX_PLANE_Y] = frame->data[0]; -- 2.7.4 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".