[FFmpeg-trac] #8106(undetermined:reopened): Unexpected audio truncation with `-c:a copy`

FFmpeg trac at avcodec.org
Tue Jan 7 03:18:28 EET 2020


#8106: Unexpected audio truncation with `-c:a copy`
-------------------------------------+-------------------------------------
             Reporter:  gdgsdg123    |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by pdr0):

 use -r and -loop as input options for the image,  and -shortest

 eg.

 {{{
 ffmpeg -loop 1 -r 15 -i image.png -i 1.webm -c:v libx264 -crf 20 -preset:v
 faster -c:a copy -shortest out.mkv
 }}}


 ffprobe -i out.mkv

 {{{
 Input #0, matroska,webm, from 'out.mkv':
   Metadata:
     ENCODER         : Lavf58.35.101
   Duration: 00:03:56.87, start: -0.007000, bitrate: 79 kb/s
     Stream #0:0: Video: h264 (High 4:4:4 Predictive),
 yuv444p(progressive), 720x
 480 [SAR 1:1 DAR 3:2], 15 fps, 15 tbr, 1k tbn, 30 tbc
     Metadata:
       ENCODER         : Lavc58.65.100 libx264
       DURATION        : 00:03:56.867000000
     Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
     Metadata:
       DURATION        : 00:03:56.561000000
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8106#comment:11>
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