[mythtv-users] Downscale HD recordings with ffmpeg

kanetse@gmail.com kane.tse at gmail.com
Tue Mar 24 18:54:23 UTC 2009


On Wed, Mar 18, 2009 at 5:40 PM, belcampo <belcampo at zonnet.nl> wrote:
>
> I've once had this too, but current ffmpeg SVN does it right, at least for
> me. I use version:
> FFmpeg version SVN-r17735, Copyright (c) 2000-2009 Fabrice Bellard, et al.
>  configuration: --prefix=/usr --enable-libx264 --enable-libxvid --enable-gpl
> --enable-libfaac --enable-libmp3lame --enable-pthreads --disable-ffserver
> --enable-libfaad --enable-ffplay --disable-vhook
>  libavutil     49.15. 0 / 49.15. 0
>  libavcodec    52.20. 0 / 52.20. 0
>  libavformat   52.31. 0 / 52.31. 0
>  libavdevice   52. 1. 0 / 52. 1. 0
>  built on Mar  2 2009 19:12:25, gcc: 4.2.2 20071128 (prerelease)
> (4.2.2-3.1mdv2008.0)
>

I tried to compile it from SVN on Mythbuntu, following the
instructions here:
http://www.webhostingtalk.com/showthread.php?p=4234345#post4234345 but
it seems to segfault immediately upon starting encoding.

FFmpeg version SVN-r18178, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --enable-shared --enable-libxvid --enable-libvorbis
--enable-libmp3lame --enable-gpl --enable-libfaad --enable-libfaac
--enable-libx264
  libavutil     50. 2. 0 / 50. 2. 0
  libavcodec    52.22. 3 / 52.22. 3
  libavformat   52.32. 0 / 52.32. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libswscale     0. 7. 1 /  0. 7. 1
  built on Mar 24 2009 11:34:05, gcc: 4.3.2

Seems stream 0 codec frame rate differs from container frame rate:
59.94 (60000/1001) -> 29.97 (30000/1001)
Input #0, mpegts, from '/data/mythtv/store/3229_20090318205900.mpg':
  Duration: 00:36:00.04, start: 46931.763644, bitrate: 12773 kb/s
  Program 1
    Stream #0.0[0x7c0]: Video: mpeg2video, yuv420p, 1920x1080 [PAR 1:1
DAR 16:9], 80000 kb/s, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0.1[0x7c1](eng): Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s
File 'result.ts' already exists. Overwrite ? [y/N] y
Segmentation fault


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