[FFmpeg-user] [HELP]capture audio question about Non-monotonous DTS??????

Soho Soho123 soho123.2012 at gmail.com
Mon Aug 5 16:34:48 CEST 2013

HI all,

when I try to capture audio and video from USB web cam and usb sound card.
the command :
ffmpeg -loglevel debug -f video4linux2 -r 30 -s 640x480 -input_format h264
-i /dev/video1 -f alsa -ar 48000 -ac 2 -i hw:0 -vcodec copy -acodec copy

I got the warning message from ffmpeg:

Non-monotonous DTS in output stream 0:0; previous: 254883622, current:
254883581; changing to 254883623. This may result in incorrect timestamps
in the output file

the VLC player can not play audio data  , but  video data can be displayed.

Does anyone have idea and the timestamp ?

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