[FFmpeg-trac] #4644(avdevice:new): Corrupt H264 when streaming H264 from v4l2 device

FFmpeg trac at avcodec.org
Thu Jul 23 06:10:48 CEST 2015

#4644: Corrupt H264 when streaming H264 from v4l2 device
             Reporter:  noah        |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avdevice
              Version:  git-master  |               Resolution:
             Keywords:  v4l2 h264   |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by noah):

 Per the suggestion in the linked thread, I did three more tests (default
 `AVSTREAM_PARSE_FULL`) with two different containers (.mov and .nut) and a
 more recent code base.

 I can confirm that the more recent code produce the same results as
 previously reported.

 I've uploaded the resulting files to upload.ffmpeg.org with the following
 $ ls -1rt |xargs du -sk
 9944    ffmpeg-headers.mov
 80      ffmpeg-20150722-222055-headers.mov.log
 7752    ffmpeg-full-once.mov
 48      ffmpeg-20150722-222152-full-once.mov.log
 6980    ffmpeg-full.mov
 44      ffmpeg-20150722-222221-full.mov.log
 4       ffmpeg-headers.nut
 16      ffmpeg-20150722-222554-headers.nut.log
 6580    ffmpeg-full.nut
 40      ffmpeg-20150722-222605-full.nut.log
 6716    ffmpeg-full-once.nut
 40      ffmpeg-20150722-222620-full-once.nut.log

 (I'm sorry I didn't think of including the ticket ID in the filenames
 before they were uploaded..)

 capturing in `libavdevice/v4l2.c` appears to produce at least .mov files
 that play nicely with Quicktime Player (OSX 10.10) and VLC (v2.2.1).

 When attempting to play the the file which was captured with
 `AVSTREAM_PARSE_HEADERS` (as is the default in git master) in Quicktime
 Player, the playback won't start even if I hit the play button.  If I
 manually seek into the middle of the file and start playing from there,
 all I get is a black screen.

Ticket URL: <https://trac.ffmpeg.org/ticket/4644#comment:4>
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