Opened 10 years ago

Closed 9 years ago

Last modified 9 years ago

#634 closed defect (fixed)

non monotonically increasing dts with v4l2

Reported by: wim Owned by:
Priority: normal Component: undetermined
Version: git-master Keywords: av_interleaved_write_frame v4l2
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

errors when encoding webcam to video file

When using .avi container:

wim@wim-ubuntu:~/croncap$ ffmpeg -f video4linux2 -s 320x240 -i /dev/video0 -vcodec libx264 -preset medium -vprofile baseline blah.avi
ffmpeg version git-2011-11-03-988f585, Copyright (c) 2000-2011 the FFmpeg developers

built on Nov 3 2011 20:03:33 with gcc 4.6.1
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-libvpx
libavutil 51. 23. 0 / 51. 23. 0
libavcodec 53. 27. 0 / 53. 27. 0
libavformat 53. 18. 0 / 53. 18. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 45. 3 / 2. 45. 3
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[video4linux2,v4l2 @ 0x1f188c0] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':

Duration: N/A, start: 422744.730718, bitrate: 18432 kb/s

Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 18432 kb/s, 15 tbr, 1000k tbn, 15 tbc

Incompatible pixel format 'yuyv422' for codec 'libx264', auto-selecting format 'yuv420p'
[buffer @ 0x1f1d060] w:320 h:240 pixfmt:yuyv422 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x1f1d4e0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
[scale @ 0x1f1dcc0] w:320 h:240 fmt:yuyv422 -> w:320 h:240 fmt:yuv420p flags:0x4
[libx264 @ 0x1f19dc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0x1f19dc0] profile Constrained Baseline, level 1.2
Output #0, avi, to 'blah.avi':

Metadata:

ISFT : Lavf53.18.0
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 320x240, q=-1--1, 15 tbn, 15 tbc

Stream mapping:

Stream #0.0 -> #0.0 (rawvideo -> libx264)

Press [q] to stop, ? for help
non-strictly-monotonic PTS.0 size= 1008450kB time=38:51:05.60 bitrate= 59.1kbits/s
non-strictly-monotonic PTS.0 size= 1008451kB time=38:51:06.13 bitrate= 59.1kbits/s
non-strictly-monotonic PTS.0 size= 1008451kB time=38:51:06.66 bitrate= 59.1kbits/s
non-strictly-monotonic PTS.0 size= 1008452kB time=38:51:07.20 bitrate= 59.1kbits/s
[libx264 @ 0x1f19dc0] non-strictly-monotonic PTS
non-strictly-monotonic PTS.0 size= 1008452kB time=38:51:07.73 bitrate= 59.1kbits/s
non-strictly-monotonic PTS.0 size= 1008453kB time=38:51:08.26 bitrate= 59.1kbits/s
non-strictly-monotonic PTS.0 size= 1008453kB time=38:51:08.80 bitrate= 59.1kbits/s
[avi @ 0x1f19600] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 2098034 >= 2098034
av_interleaved_write_frame(): Invalid argument

When using .mkv container:

wim@wim-ubuntu:~/croncap$ ffmpeg -f video4linux2 -s 320x240 -i /dev/video0 -vcodec libx264 -preset medium -vprofile baseline eggs.mkv
ffmpeg version git-2011-11-03-988f585, Copyright (c) 2000-2011 the FFmpeg developers

built on Nov 3 2011 20:03:33 with gcc 4.6.1
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-libvpx
libavutil 51. 23. 0 / 51. 23. 0
libavcodec 53. 27. 0 / 53. 27. 0
libavformat 53. 18. 0 / 53. 18. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 45. 3 / 2. 45. 3
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0

[video4linux2,v4l2 @ 0x164a8c0] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':

Duration: N/A, start: 2250.662157, bitrate: 18432 kb/s

Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 18432 kb/s, 15 tbr, 1000k tbn, 15 tbc

Incompatible pixel format 'yuyv422' for codec 'libx264', auto-selecting format 'yuv420p'
[buffer @ 0x164a7e0] w:320 h:240 pixfmt:yuyv422 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x164f720] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
[scale @ 0x164ff80] w:320 h:240 fmt:yuyv422 -> w:320 h:240 fmt:yuv420p flags:0x4
[libx264 @ 0x164bf60] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0x164bf60] profile Constrained Baseline, level 1.2
[libx264 @ 0x164bf60] 264 - core 119 r2106 07efeb4 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, matroska, to 'eggs.mkv':

Metadata:

encoder : Lavf53.18.0
Stream #0:0: Video: h264, yuv420p, 320x240, q=-1--1, 1k tbn, 15 tbc

Stream mapping:

Stream #0.0 -> #0.0 (rawvideo -> libx264)

Press [q] to stop, ? for help
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:38.66 bitrate= 46.6kbits/s
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:39.20 bitrate= 46.6kbits/s
[libx264 @ 0x164bf60] non-strictly-monotonic PTS
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:39.73 bitrate= 46.6kbits/s
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:40.26 bitrate= 46.6kbits/s
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:40.80 bitrate= 46.6kbits/s
[libx264 @ 0x164bf60] non-strictly-monotonic PTS
non-strictly-monotonic PTS.0 size= 796312kB time=38:50:41.33 bitrate= 46.6kbits/s
[matroska @ 0x164b600] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 139841733 >= 139841733
av_interleaved_write_frame(): Invalid argument

Attachments (2)

17.png (146.0 KB ) - added by wim 10 years ago.
debug.txt (1.3 MB ) - added by blsa 10 years ago.

Download all attachments as: .zip

Change History (16)

comment:1 by Carl Eugen Hoyos, 10 years ago

Keywords: av_interleaved_write_frame added
Version: unspecifiedgit-master

Is an external library required to reproduce this problem (is the problem also reproducible without -vcodec libx264)?

comment:2 by wim, 10 years ago

Which vcodec can I use that will not use external library?

comment:3 by Carl Eugen Hoyos, 10 years ago

mpeg1video, mpeg2video, mpeg4, msmpeg4, msmpeg4v2, mjpeg, ljpeg, jpegls, ffv1, ffvhuff, flv, snow, svq1, wmv1, wmv2 come to mind (I probably forgot some), but simply omitting "-vcodec libx264 -preset medium -vprofile baseline" is sufficient to let FFmpeg automatically choose a codec suitable for avi (mpeg4 asp).

by wim, 10 years ago

Attachment: 17.png added

comment:4 by wim, 10 years ago

I tried it with omitting the stuff, and ffmpeg chooses

Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46)

giving a similar error like:

Error, Invalid timestamp=2098226, last=2098226
Video encoding failed

You can see the rest in the screencap attached above.

comment:5 by Carl Eugen Hoyos, 10 years ago

Keywords: v4l2 added

Did your recording really run for more than a day?

Please always post complete, uncut console output as text, please do not attach screen-shots instead (there are cases when this is useful, but they are very rare).

comment:6 by wim, 10 years ago

Yes, the recording duration is correct. It is recording to ext4 filesystem and plenty of space on disk.

I posted the screenshot because the console output as text might be misleading in this case (see the coloured error line over-writing on the usual ffmpeg stderr chat in black)

in reply to:  6 comment:7 by Carl Eugen Hoyos, 10 years ago

Replying to wim:

I posted the screenshot because the console output as text might be misleading in this case (see the coloured error line over-writing on the usual ffmpeg stderr chat in black)

It cannot be misleading, at least not in this case.

comment:8 by Carl Eugen Hoyos, 10 years ago

Status: newopen

I was able to trigger a similar error by running an encode for >26 hours.

$ ffmpeg -async 1 -f v4l2 -i /dev/video1 -f alsa -i hw:2 -s 64x64 out.avi
ffmpeg version N-35411-g28a11a6, Copyright (c) 2000-2011 the FFmpeg developers
  built on Dec  3 2011 14:27:33 with gcc 4.5.3
  configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
  libavutil    51. 29. 1 / 51. 29. 1
  libavcodec   53. 40. 0 / 53. 40. 0
  libavformat  53. 24. 0 / 53. 24. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 50. 0 /  2. 50. 0
  libswscale    2.  1. 0 /  2.  1. 0
[video4linux2,v4l2 @ 0x139f7e0] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video1':
  Duration: N/A, start: 1322924421.201907, bitrate: 132710 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 768x576, 132710 kb/s, 25 tbr, 1000k tbn, 25 tbc
[alsa @ 0x139a040] Estimating duration from bitrate, this may be inaccurate
Input #1, alsa, from 'hw:2':
  Duration: N/A, start: 1322924421.195346, bitrate: N/A
    Stream #1:0: Audio: pcm_s16le, 32000 Hz, 2 channels, s16, 1024 kb/s
File 'out.avi' already exists. Overwrite ? [y/N] y
w:768 h:576 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
[scale @ 0x13a4e00] w:768 h:576 fmt:yuv420p -> w:64 h:64 fmt:yuv420p flags:0x4
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
[ac3 @ 0x13a4220] channel_layout not specified
[ac3 @ 0x13a4220] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf53.24.0
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 64x64, q=2-31, 200 kb/s, 25 tbn, 25 tbc
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 32000 Hz, stereo, flt, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
  Stream #1:0 -> #0:1 (pcm_s16le -> ac3)
Press [q] to stop, [?] for help
[alsa @ 0x139a040] ALSA buffer xrun.
ALSA buffer xrun.= 25 q=2.0 size= 3314018kB time=26:37:07.29 bitrate= 283.3kbits/s dup=0 drop=453
Error, Invalid timestamp=2399562, last=2399562me=26:39:42.40 bitrate= 283.3kbits/s dup=0 drop=453
Video encoding failed

comment:9 by blsa, 10 years ago

I second this issue.

I'm using ffmpeg+ffserver to transfer RTSP stream to FLV stream, played in Flash player.
ffmpeg -rtsp_transport tcp -i rtsp://ipaddress:554 -vcodec copy -an http://127.0.0.1:8010/feed1.ffm

I heard there is higher chance when using -vcodec copy to remux the stream into FLV stream.

by blsa, 10 years ago

Attachment: debug.txt added

comment:10 by blsa, 10 years ago

I attached a complete log file in the above, which is the output of the following command

ffmpeg -rtsp_transport tcp -i rtsp://10.8.0.2:554 -vcodec copy -an -r 10 http://127.0.0.1:8010/feed1.ffm -loglevel debug 2> debug.txt

Hopefully, someone can look into this.

comment:11 by Michael Niedermayer, 9 years ago

Summary: non monotonically increasing dtsnon monotonically increasing dts with v4l2

comment:12 by holden, 9 years ago

Could somebody still reproduce this by running for example:

ffmpeg -f v4l2 -video_size 320x240 -framerate 10 -i /dev/video0 out.avi

with current git head?

comment:13 by Carl Eugen Hoyos, 9 years ago

Resolution: fixed
Status: openclosed

Appears to work fine now.

$ ffmpeg -f v4l2 -video_size 64x48 -framerate 10 -i /dev/video0 out.avi
ffmpeg version N-51435-g24cfe91 Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar 29 2013 06:11:26 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --disable-indev=jack
  libavutil      52. 22.101 / 52. 22.101
  libavcodec     55.  2.100 / 55.  2.100
  libavformat    55.  0.100 / 55.  0.100
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 48.105 /  3. 48.105
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[video4linux2,v4l2 @ 0x2e3d140] The driver does not allow to change time per frame
[video4linux2,v4l2 @ 0x2e3d140] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 1364536659.669939, bitrate: 921 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 64x48, 921 kb/s, 25 fps, 25 tbr, 1000k tbn, 1000k tbc
[mpeg4 @ 0x2e3f120] too many threads/slices (4), reducing to 3
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf55.0.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 64x48, q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
Press [q] to stop, [?] for help
frame=7269585 fps= 25 q=2.0 Lsize= 7188621kB time=80:46:23.80 bitrate= 202.5kbits/s
video:7054192kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.905667%

comment:14 by holden, 9 years ago

Thanks for taking the time to test and close the ticket! :)

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