theora - Sep 2009 - Accelerated video output with ffmpeg2theora 0.24

When I converted two files with ffmpeg2theora their duration changed shorter -
they seem to play back with accelerated speed. When I play one of them with VLC,
the video stops at 99 seconds but audio continues until 170 seconds. The other
file is 120 seconds long but it is played back in 80 seconds.

Here is ffmpeg2theora output:

$ ffmpeg2theora --optimize --inputfps 25 -F 25 2002-05-23\ Juho\ prinssina.AVI 
Input #0, avi, from '2002-05-23 Juho prinssina.AVI':
  Duration: 00:02:36.76, start: 0.000000, bitrate: 107321 kb/s
    Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25 tbr, 25 tbn, 25 tbc
    Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
  Resize: 720x576
      0:02:36.76 audio: 78kbps video: 8080kbps, time elapsed: 00:13:26

$ ffmpeg2theora --inputfps 25 -F 25 196X\ Juhani\ pienen?\ LAAJEMPI\ VERSIO.AVI 
Input #0, avi, from '196X Juhani pienen? LAAJEMPI VERSIO.AVI':
  Duration: 00:01:59.59, start: 0.000000, bitrate: 109973 kb/s
    Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25.02 tbr, 25.02 tbn, 25.02
tbc
  Resize: 720x576
      0:01:19.31 audio: 0kbps video: 5449kbps, time remaining: 00:04:19

I have tried with and without options "--optimize --inputfps 25 -F
25", no change.

I'm using Fedora 11 with the following packages:

libtheora-1.0-3.fc11.i586
ffmpeg2theora-0.24-1.fc11.i586
vlc-1.0.1-2.fc11.i586

Does anybody have a clue what might be the problem here?

On 09/06/2009 01:00 PM, Juhani Jaakola wrote:
> When I converted two files with ffmpeg2theora their duration changed
shorter - they seem to play back with accelerated speed. When I play one of them
with VLC, the video stops at 99 seconds but audio continues until 170 seconds.
The other file is 120 seconds long but it is played back in 80 seconds.
>
> Here is ffmpeg2theora output:
>
> $ ffmpeg2theora --optimize --inputfps 25 -F 25 2002-05-23\ Juho\
prinssina.AVI
> Input #0, avi, from '2002-05-23 Juho prinssina.AVI':
>    Duration: 00:02:36.76, start: 0.000000, bitrate: 107321 kb/s
>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25 tbr, 25 tbn, 25 tbc
>      Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
>    Resize: 720x576
>        0:02:36.76 audio: 78kbps video: 8080kbps, time elapsed: 00:13:26
>
> $ ffmpeg2theora --inputfps 25 -F 25 196X\ Juhani\ pienen?\ LAAJEMPI\
VERSIO.AVI
> Input #0, avi, from '196X Juhani pienen? LAAJEMPI VERSIO.AVI':
>    Duration: 00:01:59.59, start: 0.000000, bitrate: 109973 kb/s
>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25.02 tbr, 25.02 tbn,
25.02 tbc
>    Resize: 720x576
>        0:01:19.31 audio: 0kbps video: 5449kbps, time remaining: 00:04:19
>
> I have tried with and without options "--optimize --inputfps 25 -F
25", no change.
>
> I'm using Fedora 11 with the following packages:
>
> libtheora-1.0-3.fc11.i586
> ffmpeg2theora-0.24-1.fc11.i586
> vlc-1.0.1-2.fc11.i586
>
> _______________________________________________
> theora mailing list
> theora at xiph.org
> http://lists.xiph.org/mailman/listinfo/theora
>

I don't know why the framerate of the input file is 25.02. The input file is
produced by Ulead Video Studio, which captures video from VHS tapes (PAL format)
via an USB frame grabber. It produces .AVI files. The frame rate of PAL is 25
fps.

When I convert those .AVI files to H.264/AAC or to xvid/MP3 with Avidemux, they
play without problems. It is only the ffmpeg2theora which causes problems. And I
have problems with ffmpeg2theora with and without those parameters (see my
original message).

Regards, JJ

j at v2v.cc kirjoitti: 
> Juhani Jaakola wrote:
> > Does anybody have a clue what might be the problem here?
> > 
> > On 09/06/2009 01:00 PM, Juhani Jaakola wrote:
> >> When I converted two files with ffmpeg2theora their duration
changed shorter - they seem to play back with accelerated speed. When I play one
of them with VLC, the video stops at 99 seconds but audio continues until 170
seconds. The other file is 120 seconds long but it is played back in 80 seconds.
> >>
> >> Here is ffmpeg2theora output:
> >>
> >> $ ffmpeg2theora --optimize --inputfps 25 -F 25 2002-05-23\ Juho\
prinssina.AVI
> >> Input #0, avi, from '2002-05-23 Juho prinssina.AVI':
> >>    Duration: 00:02:36.76, start: 0.000000, bitrate: 107321 kb/s
> >>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25 tbr, 25
tbn, 25 tbc
> >>      Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536
kb/s
> >>    Resize: 720x576
> >>        0:02:36.76 audio: 78kbps video: 8080kbps, time elapsed:
00:13:26
> >>
> >> $ ffmpeg2theora --inputfps 25 -F 25 196X\ Juhani\ pienen?\
LAAJEMPI\ VERSIO.AVI
> >> Input #0, avi, from '196X Juhani pienen? LAAJEMPI
VERSIO.AVI':
> >>    Duration: 00:01:59.59, start: 0.000000, bitrate: 109973 kb/s
> >>      Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25.02 tbr,
25.02 tbn, 25.02 tbc
> >>    Resize: 720x576
> >>        0:01:19.31 audio: 0kbps video: 5449kbps, time remaining:
00:04:19
> >>
> why does the input file have a framerate of 25.02? forcing input
> framerate might not work, it was mostly used for video4linux devices.
> but can have a look in the source to see if it can be extended to also
> overwrite the framerate from the input container.
> 
> 
> j
>

On Sun, 6 Sep 2009 13:00:27 +0300 (EEST)
Juhani Jaakola <juhani.jaakola at kolumbus.fi> wrote:
> When I converted two files with ffmpeg2theora their duration changed
> shorter - they seem to play back with accelerated speed. When I play
> one of them with VLC, the video stops at 99 seconds but audio
> continues until 170 seconds. The other file is 120 seconds long but
> it is played back in 80 seconds.
hello.

sorry for reanimating this thread but has anybody looked into those
issues. i have the same effect with ffmpeg2theora 0.24 and 0.25 when i
try to convert 3gp videos to theora.

since 0.24 the length of the created theora video is the same as the
original, but the video plays double speed and stops after half the
time.

startx

On 10/6/09, startx <startx at plentyfact.org>
wrote:
> since 0.24 the length of the created theora video is the same as the
> original, but the video plays double speed and stops after half the
> time.
Hello,

Please provide links for the original 3GP file and the resulting Ogg
file, which you describe as playing at twice the speed it should.

-Ivo