PS3 fast forward no sound problems

[spam.mc]

I can't quite remember how I was able to tell I file was bad,  I think I 
was using one of ffmpeg's own tools  ffprobe? to view the file data. 
Unfortunately I've deleted the "bad" files now so don't have one to look 
at.  If you compare the bad files against good ones, you should be able 
to spot the difference.

This is a batch file that I was playing with to reconvert the audio in a 
"bad" file, I was trying out various settings to see what was best,  I'm 
sure I tried many more which I didn't keep.  The PC was upstairs and I 
had to go back downstairs to view the result on the PS3, it got a bit 
tedious / tiring!

ffmpeg.exe -i bad.mp4 -vcodec copy -acodec mp2 new.mp4
ffmpeg.exe -i bad.mp4 -vcodec copy -acodec aac -ar 48000 new-a2.mp4
ffmpeg.exe -i bad.mp4 -vcodec copy -acodec aac -ar 48000 -ab 94k new-94.mp4

In the end I just installed the working older version and re-downloaded 
the bad files from various "other" sources.

Another fix was to use free PS3 Media Server application on the PC to 
transcode the output whilst streaming it to the PS3.

Later on I bought one of these: 
http://www.ebuyer.com/267867-emachine-er1401-desktop-pt-nbzec-004 and 
installed XBMC to do my media playback with, uses less power than the 
PS3 and is much quieter.  It was £129 at the time.   It's quite a 
powerful little PC for the money, I keep meaning to install MAME etc on 
it too but haven't found the time.


On 17/10/2011 15:10, Oliver Christmas wrote:
> Thanks for the reply Michael.  Yes I have an archived version.
>
> You mention "You can extract and re-encoding the sound track with the
> correct parameters and it fixes the problem on existing files".  Could
> you tell me how I can do this - especially as a batch job on a folder
> of files?  Also is there a "media properties viewer" type program that
> would show if the audio is encoded incorrectly?
>
> Thanks again.
>
> On 17 October 2011 13:47, spam.mc<spam.mc at gmail.com>  wrote:
>> I had this problem and found it was due to the version of ffmpeg.exe being
>> used.
>> I "downgraded" to this one:
>>
>> FFmpeg version SVN-r22140-Sherpya, Copyright (c) 2000-2010 the FFmpeg
>> developers
>>
>>   built on Mar  2 2010 03:26:44 with gcc 4.2.5 20080919 (prerelease)
>> [Sherpya]
>>   libavutil     50. 9. 0 / 50. 9. 0
>>   libavcodec    52.55. 0 / 52.55. 0
>>   libavformat   52.54. 0 / 52.54. 0
>>   libavdevice   52. 2. 0 / 52. 2. 0
>>   libavfilter    1.17. 0 /  1.17. 0
>>   libswscale     0.10. 0 /  0.10. 0
>>   libpostproc   51. 2. 0 / 51. 2. 0
>>
>> Which fixes the problem (doesn't have the bug).
>>
>> IRC the probliem is that newer versions of ffmpeg produce files where the
>> audio bit rate gets encoded incorrectly and confuses the PS3 into not
>> playing the file at the correct speed.
>> You can extract and re-encoding the sound track with the correct parameters
>> and it fixes the problem on existing files.  But downgrading to that older
>> version of ffmpeg fixes the problem on new downloads.
>>
>> I don't know if the latest version ffmpeg has this problem fixed,  I've not
>> tried it out as I know the older one works fine.
>>
>> If you can't get hold of the older version let me know and I'll put it
>> somewhere you can download it.
>>
>> HTH
>>
>> Michael
>>
>> On 17/10/2011 12:22, Oliver Christmas wrote:
>>> Hi there.  I have found out about the FFMPEG problem with watching
>>> get_iplayer MP4s on a PS3 (video plays fast and with no sound).  I
>>> have got a problem in that I upgraded latest get_iplayer and forgot to
>>> roll back the FFMPEG version.
>>> 1. Is there anyway I can tell which video files are affected (without
>>> playing them)
>>> 2. Is there anyway I can "convert" the files to be playable?
>>>
>>> Any help much appreciated.
>>>
>>> _______________________________________________
>>> get_iplayer mailing list
>>> get_iplayer at lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/get_iplayer
>>>
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