[libav-tools] trying to convert mp4 to mpeg-1

Nick Lawrence n1cklawr3nc3 at gmail.com
Tue Jan 28 23:03:31 CET 2014


C:\DATA\video>avconv -i map.mp4 -c:v mpeg2video -r:v 29.97 -s hd720 -b:v
18000k -maxrate:v 20000k -minrate:v 12000k -c:a libmp3lame -q:a 2 map.mpg
avconv version 9.7, Copyright (c) 2000-2013 the Libav developers
  built on Jun 16 2013 20:03:03 with gcc 4.7.2 (Gentoo 4.7.2 p1.3,
pie-0.5.5)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'map.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2011-10-31 19:42:39
  Duration: 00:01:00.33, start: 0.000000, bitrate: 348 kb/s
    Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 640x360,
274 kb/s, 15 fps, 15 tbr, 30 tbn, 30 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
    Stream #0.1(und): Audio: aac, 44100 Hz, mono, fltp, 71 kb/s
    Metadata:
      creation_time   : 2011-10-31 19:42:39
[mpeg2video @ 01AAFAA0] a vbv buffer size is needed, for encoding with a
maximum bitrate
Output #0, mpeg, to 'map.mpg':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2011-10-31 19:42:39
    Stream #0.0(und): Video: mpeg2video, yuv420p, 1280x720, q=2-31, 18000
kb/s, 90k tbn, 29.97 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
    Stream #0.1(und): Audio: libmp3lame, 44100 Hz, mono, fltp
    Metadata:
      creation_time   : 2011-10-31 19:42:39
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> mpeg2video)
  Stream #0:1 -> #0:1 (aac -> libmp3lame)
Error while opening encoder for output stream #0:0 - maybe incorrect
parameters such as bit_rate, rate, width or height

C:\DATA\video>


On Tue, Jan 28, 2014 at 10:37 PM, Luca Barbato <lu_zero at gentoo.org> wrote:

> On 28/01/14 01:11, Nick Lawrence wrote:
> > My original file map.mp4 has a bitrate of 348 kb/s and a resolution of
> > 640*360
> >
> > I think that is well within the limits of mpeg1?
> >
>
> Paste the whole error message, the framerate could be not matching and
> it should print a message with all the info.
>
> lu
>
> _______________________________________________
> libav-tools mailing list
> libav-tools at libav.org
> https://lists.libav.org/mailman/listinfo/libav-tools
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