[FFmpeg-trac] #4030(avdevice:open): V4L2 recording results in invalid data & buffer still owned errors

FFmpeg trac at avcodec.org
Tue Oct 21 20:18:41 CEST 2014


#4030: V4L2 recording results in invalid data & buffer still owned errors
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             Reporter:  thender     |                    Owner:  holden
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avdevice
              Version:  git-master  |               Resolution:
             Keywords:  v4l2        |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  1           |
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Comment (by holden):

 Replying to [comment:16 thender]:
 > Doh, nevermind. Spoke too soon. I get this on the 2nd recording.
 >
 > [video4linux2,v4l2 @ 0x1c2ff80] Dequeued v4l2 buffer contains corrupted
 data (0 bytes).
 >

 The message above simply means that the v4l2 driver has passed a corrupt
 frame to the application (ffmpeg). In this case the application can just
 ignore it and continue (it is supposed to be a recoverable error). Apart
 from that warning, does the recording work when you play it again?

 > And when I go to record, it leaves off where I was before.

 What do you mean by that? Also, could you please post the complete output
 adding -loglevel debug to your command line?

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Ticket URL: <https://trac.ffmpeg.org/ticket/4030#comment:17>
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