[MEncoder-users] audio sync problens when encoding realtime TV

[Roberto Hradec]

Yeah... my first choice was to save straight to MP4... But the mp4 
output of mencoder does not play on ITunes. And thats my problem... I 
need to generate ITunes compatible files to publish as podcasts.

I endup saving as ASF for no particular reason... I did tests saving 
straight to MP4,MPEG, PSP MP4 and AVI from mencoder. All of then save 
correclty, with no sync problems (just like asf). But when I try to 
remux using mp4creator I get the same problem (just sometimes... again, 
the sync problem happens just sometimes when theres loads of frame 
droppings).

I've being testing this file-format combinations for about 5 weeks 
now... its hard because I need to wait for a frame-dropping situation to 
check if the file format is holding or not when de-muxing and muxing 
back to mp4. All file formats works fine on 80% of the encodings.

When you say to use YAMB, what exactly you talking about? is there 
something on yamb (mp4box) to fix a mencoder mp4 file without 
demuxing/muxing it, to be able to run in quicktime/itunes?

maybe I'm missing something here... I would love to encode the video and 
just publish it, whitout the need to remux it...

-H



Nico Sabbi wrote:
> Roberto Hradec wrote:
>
>   
>> Hi There...
>>
>> I use mencoder compiled with X264 and FAAC to do realtime capture and 
>> encode of live TV (in ASF).  After doing the capture/encode, I use 
>> mplayer to separate the A/V tracks, and mp4creator to combine those 
>> tracks back into a ITunes/Quicktime compatible mp4.
>>  
>>
>>     
>
> why don't you save directly to .mp4 (with -of lavf) and
> eventually use yamb on this mp4 if qt doens't work?
> You are calling for problems
>
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