[MEncoder-users] encode to h264 (flash support)

[Alex Samad]

On Mon, Mar 03, 2008 at 08:40:42PM +0100, Grozdan Nikolov (openSUSE Linux) wrote:
> On Monday 03 March 2008 20:35, Alex Samad wrote:
> > On Mon, Mar 03, 2008 at 01:39:14PM +0100, Grozdan Nikolov (openSUSE Linux) 
> wrote:
> > > On Monday 03 March 2008 13:33, Ing. Branislav Gerzo wrote:
> > > > GN> mencoder generates broken files when used with the lavf muxer and
> > > > b-frames. If
> > > >
> > > > I see. is there some workaround for this (except using other
> > > > programs, if possible)? I think not using b-frames in h.264 is not
> > > > good idea. Or I will wait for some next release of mencoder, where it
> > > > will be fixed?
> > >
> > > not at the moment, this won't be fixed any time soon. If you want to
> > > directly output to h264+b-frames MP4 then use ffmpeg, not mencoder
> >
> > (being a newbie to encoding), why would you suggest ffmpeg and not x264
> > to do the encoding.
> 
> I don't know, it was the first thing that popped into my mind. :) x264 is 
> perfectly fine too but it only accepts raw yuv sources and must be compiled 
> with gpac support for mp4 output
yep, which is why I had to go to transcode. I use this on debian so it
is a simple apt-get install...

What bugs me about making x264 in avi containers and then moving them to
mp4 containers is why move them over to mp4, if it is for better support
of h264, then isn't something lost by creating them in avi containers
and if you can create that on the fly with tools like MP4Box, why don't
players do that instead of having to pre encode (I am probably missing
something obvious to the experienced pro, like I said I am a weekend
cowboy when it come to encoding)

> 
> >
> > I recently went through the process of trying to encode some avi files,
> > that would not play with mplayer or mencoder (it would bomb out), I had
> > to use transcode with import lav not ffmpeg (just realised i could have
> > probably done the same with mencoder) export to yuv4mpeg and then
> > process with x264, process the audio and then merge back together with
> > MP4Box
> >
> > Is there any time frame on when mencoder will be able to handle mp4
> > files directly ?
> 
> mencoder already handles mp4's just fine, if you don't use b-frames that is. 
> I'm no mencoder expert/coder but I think someone just needs to rewrite 
> mencoder.c and add proper lavc support into it... fix the damn timestamps :) 
> 
> >
> > > > GN> you want to use b-frames, then encode to AVI using the standard way
> > > > (don't GN> use lavf) and then use MP4Box to remux the AVI into the MP4
> > > > container
> > > >
> > > > yes, this worked quite OK (I get A/V sync errors...), so in other
> > > > words I _have_ to use mp4box if I want h.264 with b-frames, right ?
> > >
> > > no, see above, you can use ffmpeg which does proper muxing
> > >
> > > you get A/V sync errors because you have to append the harddup video
> > > filter at the end of the filter chain
> > >
> > > > also for encoding HE-AAC I can use mencoder using faac, or I have use
> > > > neroAacEnc?
> > >
> > > mencoder/faac don't support yet HE-AAC, so you have to use neroAacEnc or
> > > aacplusenc
> > >
> > > http://teknoraver.campuslife.it/software/mp4tools/aacplusenc-0.16.3.tar.b
> > >z2
> > >
> > > > Thank you.
> > > >
> > > > /Brano
> > > > _______________________________________________
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> > > > MEncoder-users at mplayerhq.hu
> > > > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
> > >
> > > --
> > > Regards
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> 
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