[MPlayer-users] Advance (ArrowUp and PageUp) upset audio for some movies - SOLVED

[Philip Rhoades]

People,


On 2013-01-28 19:14, Philip Rhoades wrote:
> People,
> 
> Some AVIs I can use ArrowUp and PageUp quite happily but with others
> the video advances appropriately but the audio restarts or is
> otherwise retarded - the important lines of the diffs of the output
> of:
> 
>   mplayer -identify -frames 1 -ao null -vo null filename.avi
> 
> between working and not working AVIs appear to be:
> 
> < VIDEO:  [FMP4]  512x384  24bpp  25.000 fps  800.2 kbps (97.7 
> kbyte/s)
> ---
>> VIDEO:  [DIVX]  512x384  24bpp  25.000 fps  1496.3 kbps (182.7 
>> kbyte/s)
> 
> < ID_VIDEO_FORMAT=FMP4
> < ID_VIDEO_BITRATE=800208
> ---
>> ID_VIDEO_FORMAT=DIVX
>> ID_VIDEO_BITRATE=1496336
> 
> < ID_AUDIO_FORMAT=1
> < ID_AUDIO_BITRATE=1024000
> ---
>> ID_AUDIO_FORMAT=17
>> ID_AUDIO_BITRATE=257760
> 
> < Opening audio decoder: [pcm] Uncompressed PCM audio decoder
> < AUDIO: 32000 Hz, 2 ch, s16le, 1024.0 kbit/100.00% (ratio: 
> 128000->128000)
> < ID_AUDIO_BITRATE=1024000
> ---
>> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
>> AUDIO: 32000 Hz, 2 ch, s16le, 257.8 kbit/25.17% (ratio: 
>> 32220->128000)
>> ID_AUDIO_BITRATE=257760
> 
> < Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
> ---
>> Selected audio codec: [ffadpcmimawav] afm: ffmpeg (FFmpeg WAV IMA 
>> ADPCM audio)
> 
> < ID_AUDIO_CODEC=pcm
> ---
>> ID_AUDIO_CODEC=ffadpcmimawav
> 
> 
> I tried changing the video and audio codecs with ffmpeg to see if I
> could resolve the issue with the problem AVIs but just seemed to make
> the problem worse.  Does anyone know why some AVIs work properly and
> others not?


I did not get a response to this post but I found this fix by trial and 
error:

   mencoder surviving.AVI -o SurvivingProgress.avi -ovc lavc -oac pcm 
-lavcopts vcodec=mpeg4

but I would still like to know why there is a problem with these videos 
in the first place . .

Regards,

Phil.
-- 
Philip Rhoades

GPO Box 3411
Sydney NSW	2001
Australia
E-mail:  phil at pricom.com.au