[FFmpeg-trac] #5411(avfilter:new): Trim filter doesn't work with time specified as HH:MM:SS

FFmpeg trac at avcodec.org
Sat Apr 9 02:50:19 CEST 2016


#5411: Trim filter doesn't work with time specified as HH:MM:SS
------------------------------------+------------------------------------
             Reporter:  mulvya      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  trim        |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+------------------------------------

Comment (by llogan):

 Example input:
 {{{
 $ ./ffmpeg -f lavfi -i testsrc=d=30 trim.mp4
 }}}

 9219ec93b145725ac74fbfbde7f67ac5135b85cf creates an invalid output.
 Behavior with current git master is the same. Using `starti` and `endi`
 instead will produce correct output, but the *i options are not documented
 in `doc/filters.texi`.
 {{{
 $ ./ffmpeg -i trim.mp4 -vf "trim=start=00:00:00:end=00:00:05" output.mp4
 ffmpeg version N-54688-g9219ec9 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Apr  7 2016 17:39:09 with gcc 5.3.0 (GCC)
   configuration:
   libavutil      52. 39.100 / 52. 39.100
   libavcodec     55. 18.102 / 55. 18.102
   libavformat    55. 12.102 / 55. 12.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 80.101 /  3. 80.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'trim.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf55.12.102
   Duration: 00:00:30.00, start: 0.000000, bitrate: 282 kb/s
     Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 281 kb/s, 25 fps, 25 tbr, 12800 tbn,
 25 tbc
     Metadata:
       handler_name    : VideoHandler
 Output #0, mp4, to 'output.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf55.12.102
     Stream #0:0(und): Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 320x240
 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 12800 tbn, 25 tbc
     Metadata:
       handler_name    : VideoHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
 Press [q] to stop, [?] for help
 frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 448.936170%
 }}}

 b3405b1bdacf83f1b9116e70b8cbd3542916b628 creates the trimmed output as
 expected.

 {{{
 $ ./ffmpeg -i trim.mp4 -vf "trim=start=00:00:00:end=00:00:05" output.mp4
 ffmpeg version N-54686-gb3405b1 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Apr  7 2016 17:33:25 with gcc 5.3.0 (GCC)
   configuration:
   libavutil      52. 39.100 / 52. 39.100
   libavcodec     55. 18.102 / 55. 18.102
   libavformat    55. 12.102 / 55. 12.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 80.101 /  3. 80.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'trim.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf55.12.102
   Duration: 00:00:30.00, start: 0.000000, bitrate: 282 kb/s
     Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 281 kb/s, 25 fps, 25 tbr, 12800 tbn,
 25 tbc
     Metadata:
       handler_name    : VideoHandler
 Output #0, mp4, to 'output.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf55.12.102
     Stream #0:0(und): Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 320x240
 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 12800 tbn, 25 tbc
     Metadata:
       handler_name    : VideoHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
 Press [q] to stop, [?] for help
 frame=  125 fps=0.0 q=2.0 Lsize=     195kB time=00:00:05.00 bitrate=
 319.4kbits/s
 video:194kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 0.682931%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5411#comment:4>
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