I am no expert but something is obviously messing up with the frame
number (a bug in ffmpeg?)
So looking at your dump, it seems to me that the frames are produced
correctly except that they all have the frame number 1.
A solution to your problem could be to drop the frame information by
transcoding to rawvideo and then to images.
Something like that:
ffmpeg -i video.mpg -r 1 -s 640x480 -c:v rawvideo -pix_fmt yuv420p out.yuv
# ffplay -f rawvideo -framerate 1 -s 640x480 -pixel_format yuv420p -i out.yuv
ffmpeg -f rawvideo -framerate 1 -s 640x480 -pixel_format yuv420p -i out.yuv
'output/frame_%06d.jpg'
or using a pipe to avoid the intermediate raw file.
ffmpeg -i video.mpg -r 1 -s 640x480 -f rawvideo -c:v rawvideo -pix_fmt
yuv420p pipe: | ffmpeg -f rawvideo -framerate 1 -s 640x480 -pixel_format
yuv420p -i pipe: output/frame%06d.jpg
On 7/15/19 8:07 PM, Griffin Smith wrote:
Hey all,
Hoping someone can help with this issue without me sharing the video file,
since I unfortunately can't - I've got a few hundred video files I'm
working with that have an issue where ffmpeg -i reports them as having a
duration of a few minutes, but when I try to split them into frames, I only
get one frame. The logs warn something about DTS discontinuity, but that
could be a red herring. Here's the raw output:
$ ffmpeg -i video.mpg
ffmpeg version n4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181127
configuration: --prefix=/usr --disable-debug --disable-static
--disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls
--enable-gpl --enable-ladspa --enable-libaom --enable-libass
--enable-libbluray --enable-libdrm --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmodplug
--enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb
--enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr
--enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2
--enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared
--enable-version3
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
[mpeg2video @ 0x56073afe6b00] Invalid frame dimensions 0x0.
Last message repeated 4 times
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 7 with DTS
62915937, packet 8 with DTS 8589979592
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 22 with DTS
62960937, packet 23 with DTS 8590024592
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 37 with DTS
63005937, packet 38 with DTS 8590069592
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 52 with DTS
63050936, packet 53 with DTS 8590114591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 67 with DTS
63095936, packet 68 with DTS 8590159591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 82 with DTS
63140936, packet 83 with DTS 8590204591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 97 with DTS
63185936, packet 98 with DTS 8590249591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 112 with DTS
63230936, packet 113 with DTS 8590294591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 127 with DTS
63275936, packet 128 with DTS 8590339591
[mpeg @ 0x56073afe4c80] DTS discontinuity in stream 0: packet 142 with DTS
63320936, packet 143 with DTS 8590384591
Input #0, mpeg, from 'video.mpg':
Duration: 00:03:17.53, start: 95444.217689, bitrate: 3602 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 720x480 [SAR 1:1
DAR 3:2], 3600 kb/s, 30 fps, 30 tbr, 90k tbn, 30 tbc
At least one output file must be specified
$ ffmpeg -i video.mpg -r 2 -s 640x480 'output/frame_%06d.jpg'
ffmpeg version n4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181127
configuration: --prefix=/usr --disable-debug --disable-static
--disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls
--enable-gpl --enable-ladspa --enable-libaom --enable-libass
--enable-libbluray --enable-libdrm --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmodplug
--enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb
--enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr
--enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2
--enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared
--enable-version3
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
[mpeg2video @ 0x564a0be99c80] Invalid frame dimensions 0x0.
Last message repeated 4 times
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 7 with DTS
62915937, packet 8 with DTS 8589979592
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 22 with DTS
62960937, packet 23 with DTS 8590024592
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 37 with DTS
63005937, packet 38 with DTS 8590069592
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 52 with DTS
63050936, packet 53 with DTS 8590114591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 67 with DTS
63095936, packet 68 with DTS 8590159591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 82 with DTS
63140936, packet 83 with DTS 8590204591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 97 with DTS
63185936, packet 98 with DTS 8590249591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 112 with DTS
63230936, packet 113 with DTS 8590294591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 127 with DTS
63275936, packet 128 with DTS 8590339591
[mpeg @ 0x564a0be97d80] DTS discontinuity in stream 0: packet 142 with DTS
63320936, packet 143 with DTS 8590384591
Input #0, mpeg, from 'video.mpg':
Duration: 00:03:17.53, start: 95444.217689, bitrate: 3602 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 720x480 [SAR 1:1
DAR 3:2], 3600 kb/s, 30 fps, 30 tbr, 90k tbn, 30 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mpeg1video (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x564a0c06d640] deprecated pixel format used, make sure you did
set range correctly
Output #0, image2, to 'output/frame_%06d.jpg':
Metadata:
encoder : Lavf58.20.100
Stream #0:0: Video: mjpeg, yuvj420p(pc), 640x480 [SAR 9:8 DAR 3:2],
q=2-31, 200 kb/s, 2 fps, 2 tbn, 2 tbc
Metadata:
encoder : Lavc58.35.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 1 fps=0.0 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=513 speed=1.89e+05x
frame= 1 fps=1.0 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=1017 speed=9.46e+04x
frame= 1 fps=0.7 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=1521 speed=6.31e+04x
frame= 1 fps=0.5 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=2022 speed=4.73e+04x
frame= 1 fps=0.4 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=2523 speed=3.79e+04x
frame= 1 fps=0.3 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=3020 speed=3.16e+04x
frame= 1 fps=0.3 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=3528 speed=2.7e+04x
frame= 1 fps=0.2 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=4032 speed=2.37e+04x
frame= 1 fps=0.2 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=4525 speed=2.1e+04x
frame= 1 fps=0.2 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=5029 speed=1.89e+04x
frame= 1 fps=0.2 q=1.6 size=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=5528 speed=1.72e+04x
frame= 1 fps=0.2 q=1.6 Lsize=N/A time=26:19:06.00 bitrate=N/A dup=0
drop=5937 speed=1.6e+04x
video:29kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
$ ls output/
frame_000001.jpg
I'm really not super familiar with video transcoding or codecs at all, so
I'm not sure where to go from here when troubleshooting this - let me know
if this isn't something that's appropriate for this mailing list, and I'm
happy to take it elsewhere - I may also be looking into hiring consulting
services per https://ffmpeg.org/consulting.html
Thanks,
Griffin
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