[MEncoder-users] Re: mp4/h264 encoding status

[Karl Mitchell]

Jon Drukman wrote:
> Karl Mitchell wrote:
>> Hi,
>>
>> A quick question.  I've been out of the loop with mencoder builds for 
>> a while.  What is the state of play with mp4/h264 encoding.  Last 
>> thing I remember, there were problems with bframes that necessitated 
>> using the "i_certify_that_i_do_not_use_bframes" option, and an 
>> audio-video muxing workaround using MP4Box.  Is this still the same?  
>> I'm trying to automate postprocessing of HDTV/ATSC mpeg-2 transport 
>> streams.
>
> correct.  if you want to use H.264 with B-frames, you need to output 
> rawvideo and use an external muxer.  i'm using mp4creator - i had 
> problems with mp4box and quicktime compatibility (some videos just 
> would not play in QT for no reason that i could see - but muxing the 
> exact same a/v streams with mp4creator played fine in QT)
>
> here's my current H.264-in-mp4 script.  you will need mencoder, ffmpeg 
> and mp4creator.  (if someone can figure out how to use mencoder to 
> generate just an .aac audio stream (no video) then you can replace the 
> ffmpeg step with that and save yourself compiling yet another app.)
-- snip --

Thanks Jon!  That script is just the sort of thing I'm looking for.

Cheers,

-Karl