Saving raw h264 packets

Tue Apr 25 20:45:23 UTC 2017

Hi John,
you should set the stream-format to byte-stream. i.e. Try the following
pipeline:

gst-launch-1.0 rtspsrc location="rtsp://
media.smart-streaming.com/mytest/mp4:sample.mp4" ! queue !
"application/x-rtp,media=video" ! rtph264depay ! h264parse ! video/x-h264,
stream-format="byte-stream" ! filesink location="test.h264"

On Tue, Apr 25, 2017 at 11:25 AM, <john.ocallaghan at accenture.com> wrote:

>
>
>
>
>
>
> Hi All
>
>
>
> I am using the following command to extract video h264 packets from my
> rtsp stream:
>
> gst-launch-1.0 rtspsrc location="rtsp://MY_BIG_BUCK_
> BUNNY_IPADDRESS/vod/sample.mp4" ! queue ! "application/x-rtp,media=video"
> ! rtph264depay ! h264parse ! filesink location="test.h264"
>
>
>
> To test my pipe and the format of the h264 packets I give that file to
> ffmpeg to create an mp4 :
>
> ffmpeg -f h264 -i test.h264 -vcodec copy test.mp4
>
>
>
> FFmpg complains trying the above command saying it cant find frames, start
> codes and eventually bombs out with
>
> “Could not write header for output file #0 (incorrect codec parameters ?):
> Invalid argument”
>
> The entire output is below.
>
>
>
> If I add a matroskamux to the gstreamer pipe I am able to play the output
> file no probs.
>
> Is there something special about the h264 raw output packets generated
> from the gst-launch command?
>
>
>
> Looking at the raw h264 output file it looks to me like there are extra
> bytes of data (maybe 35bytes ?) in front of the first h264 packet. But I
> could be way off with that. And following packets seem to have an offset
> counter that’s incrementing  (eg 00000001 … 0000008F).
>
>
>
> Can anyone out there help me to get the output h264 raw file into a format
> that can be read by ffmpeg?
>
>
>
> Many (many many!) thanks
>
> John
>
>
>
>
>
> $ ffmpeg -f h264 -i test.h264 -vcodec copy test.mp4
>
> ffmpeg version 3.1.4 Copyright (c) 2000-2016 the FFmpeg developers
>
>   built with Apple LLVM version 8.0.0 (clang-800.0.38)
>
>   configuration: --prefix=/usr/local/Cellar/ffmpeg/3.1.4 --enable-shared
> --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables
> --enable-avresample --cc=clang --host-cflags= --host-ldflags=
> --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid
> --disable-lzma --enable-vda
>
>   libavutil      55. 28.100 / 55. 28.100
>
>   libavcodec     57. 48.101 / 57. 48.101
>
>   libavformat    57. 41.100 / 57. 41.100
>
>   libavdevice    57.  0.101 / 57.  0.101
>
>   libavfilter     6. 47.100 /  6. 47.100
>
>   libavresample   3.  0.  0 /  3.  0.  0
>
>   libswscale      4.  1.100 /  4.  1.100
>
>   libswresample   2.  1.100 /  2.  1.100
>
>   libpostproc    54.  0.100 / 54.  0.100
>
> [h264 @ 0x7fb4fa008600] missing picture in access unit with size 1055
>
> [h264 @ 0x7fb4fa008600] data partitioning is not implemented. Update your
> FFmpeg version to the newest one from Git. If the problem still occurs, it
> means that your file has a feature which has not been implemented.
>
> [h264 @ 0x7fb4fa008600] If you want to help, upload a sample of this file
> to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing
> list. (ffmpeg-devel at ffmpeg.org)
>
> [h264 @ 0x7fb4fa008600] no frame!
>
> [h264 @ 0x7fb4fa008600] log2_max_frame_num_minus4 out of range (0-12): 50
>
> [h264 @ 0x7fb4fa008600] missing picture in access unit with size 2030
>
> [h264 @ 0x7fb4fa008600] Invalid NAL unit 2, skipping.
>
> [h264 @ 0x7fb4fa008600] data partitioning is not implemented. Update your
> FFmpeg version to the newest one from Git. If the problem still occurs, it
> means that your file has a feature which has not been implemented.
>
> [h264 @ 0x7fb4fa008600] If you want to help, upload a sample of this file
> to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing
> list. (ffmpeg-devel at ffmpeg.org)
>
> [h264 @ 0x7fb4fa008600] no frame!
>
> [h264 @ 0x7fb4fa008600] missing picture in access unit with size 63108
>
> [h264 @ 0x7fb4fa008600] Invalid NAL unit 2, skipping.
>
>     Last message repeated 1 times
>
> [h264 @ 0x7fb4fa008600] Invalid NAL unit 29, skipping.
>
> [h264 @ 0x7fb4fa008600] no frame!
>
> [h264 @ 0x7fb4fa008600] sps_id 24 out of range
>
> [h264 @ 0x7fb4fa008600] non-existing PPS 0 referenced
>
> [h264 @ 0x7fb4fa008600] Invalid NAL unit 16, skipping.
>
>     Last message repeated 2 times
>
> [h264 @ 0x7fb4fa008600] No start code is found.
>
> [h264 @ 0x7fb4fa008600] Error splitting the input into NAL units.
>
> [h264 @ 0x7fb4f8800000] decoding for stream 0 failed
>
> [h264 @ 0x7fb4f8800000] Could not find codec parameters for stream 0
> (Video: h264, none): unspecified size
>
> Consider increasing the value for the 'analyzeduration' and 'probesize'
> options
>
> Input #0, h264, from 'test.h264':
>
>   Duration: N/A, bitrate: N/A
>
>     Stream #0:0: Video: h264, none, 37.50 fps, 25 tbr, 1200k tbn, 50 tbc
>
> File 'test.mp4' already exists. Overwrite ? [y/N] y
>
> [mp4 @ 0x7fb4f8800600] Using AVStream.codec to pass codec parameters to
> muxers is deprecated, use AVStream.codecpar instead.
>
> [mp4 @ 0x7fb4f8800600] dimensions not set
>
> Output #0, mp4, to 'test.mp4':
>
>     Stream #0:0: Video: h264, none, q=2-31, 37.50 fps, 25 tbr, 1200k tbn,
> 1200k tbc
>
> Stream mapping:
>
>   Stream #0:0 -> #0:0 (copy)
>
> Could not write header for output file #0 (incorrect codec parameters ?):
> Invalid argument
>
>
>
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-- 
Mehdi Semsarzadeh
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