#11192: Raw H264 stream has incorrect frame rate
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Reporter: ariley | Type: defect
Status: new | Priority: important
Component: avformat | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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ffmpeg incorrectly decides that the frame rate for the certain H264
streams is 25fps, rather than 29.97fps:
{{{
$ ./ffprobe regression_ba4b73c977.h264
ffprobe version N-110262-gba4b73c977 Copyright (c) 2007-2023 the FFmpeg
developers
built with gcc 12 (Debian 12.2.0-14)
configuration: --extra-cflags=-g --extra-cxxflags=-g --optflags=-O0
libavutil 58. 6.100 / 58. 6.100
libavcodec 60. 9.100 / 60. 9.100
libavformat 60. 4.101 / 60. 4.101
libavdevice 60. 2.100 / 60. 2.100
libavfilter 9. 5.100 / 9. 5.100
libswscale 7. 2.100 / 7. 2.100
libswresample 4. 11.100 / 4. 11.100
[h264 @ 0x564e43afcdc0] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #0, h264, from 'regression_ba4b73c977.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:2:2), yuv422p10le(tv, bt709, top
first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 29.97 tbr, 1200k tbn
}}}
This is a regression -- prior to {{{ba4b73c977}}}, the FPS value was
correctly detected as 29.97:
{{{
$ ./ffprobe incorrect_fps.h264
ffprobe version N-110261-gd56652fdc8 Copyright (c) 2007-2023 the FFmpeg
developers
built with gcc 12 (Debian 12.2.0-14)
configuration: --extra-cflags=-g --extra-cxxflags=-g --optflags=-O0
libavutil 58. 6.100 / 58. 6.100
libavcodec 60. 9.100 / 60. 9.100
libavformat 60. 4.101 / 60. 4.101
libavdevice 60. 2.100 / 60. 2.100
libavfilter 9. 5.100 / 9. 5.100
libswscale 7. 2.100 / 7. 2.100
libswresample 4. 11.100 / 4. 11.100
[h264 @ 0x556699756dc0] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #0, h264, from 'regression_ba4b73c977.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:2:2), yuv422p10le(tv, bt709, top
first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1200k tbn
}}}
Increasing the probe size does not help.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11192>
FFmpeg <https://ffmpeg.org>
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