Hello,
I'm having problem with conversion from h264 to mp4.
I would like to pack h264 stream into mp4 container. The stream in mp4
format is going to be played in chrome browser with html5 video and MSE.
I'm trying to do this with following command:
ffmpeg -f h264 -i 720p.h264 -c:v copy -an -movflags
frag_keyframe+empty_moov+default_base_moof -f mp4 720p.mp4
but the output stream is not correctly played by chrome. It looks like
there is problem with 'timescale' and 'default sample flags'. Boxes mvhd
and mdhd contains different timescale. Box tfhd contains default sample
flags = 1010000.
Here is log from stdout of the ffmpeg:
$ ffmpeg -f h264 -i 720p.h264 -c:v copy -an -movflags
frag_keyframe+empty_moov+default_base_moof -f mp4 720p.mp4
ffmpeg version N-89551-gbc10260 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.4 (Ubuntu 4.9.4-2ubuntu1~14.04.1)
configuration:
libavutil 56. 6.100 / 56. 6.100
libavcodec 58. 8.100 / 58. 8.100
libavformat 58. 3.100 / 58. 3.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 7.100 / 7. 7.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
Input #0, h264, from '720p.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p(progressive), 1280x720
[SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 1200k tbn, 60 tbc
File '720p.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to '720p.mp4':
Metadata:
encoder : Lavf58.3.100
Stream #0:0: Video: h264 (High) (avc1 / 0x31637661),
yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 30 fps, 30
tbr, 1200k tbn, 1200k tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x20ae880] Timestamps are unset in a packet for stream 0. This is
deprecated and will stop working in the future. Fix your code to set the
timestamps properly
[mp4 @ 0x20ae880] pts has no value
Last message repeated 1251 times
frame= 1252 fps=0.0 q=-1.0 Lsize= 6304kB time=00:00:41.63
bitrate=1240.3kbits/s speed=1.25e+03x
video:6293kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.184422%
I would like to notice that the same h264 stream has been successfully
converted to mp4 by mp4box command:
MP4Box -add 720p.h264 -dash -1 -frag 5000 test-out.mp4.
Could you give me any clue how to do the same with ffmpeg?
Best regards,
Grzegorz Wolny
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