[FFmpeg-user] FLV(Speex + H.264) --> MP4(AAC + H.264) Converstion

[Leo Papadopoulos]

Tom:

Thank you that is excellent advice. I will download and compile. I will
start a separate thread on this issues with compiling on Ubuntu V10.10. I
am using this guide:
http://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuideLucid

I will get back to this thread once I have some results.

Leo P.


On Wed, Dec 19, 2012 at 11:49 AM, Tom Evans <tevans.uk at googlemail.com>wrote:

> On Wed, Dec 19, 2012 at 2:44 PM, Leo Papadopoulos <leo at telecomcto.com>
> wrote:
> > Dear Group:
> >
> > I have FLV files that contain Speex Audio and H.264 video that I need to
> > convert to MP4 with AAC audio and H.264 video.
> >
> > I used the following command:
> > ffmpeg -i telecomcto.flv telecomctotest.mp4 -vcodec h264 -acodec aac
> >
> > Results:
> > - File plays on my Windows PC but is jittery.
> > - File plays audio only on my iPad.
> > - File does not play at all on my Andriod Tablet that has newest Andriod
> OS.
> >
> > These errors are possible the problem:
> > [libspeex @ 0x8b68be0]Missing Speex header, assuming defaults.
> > [h264 @ 0x8b68650]non-existing SPS 32 referenced in buffering period
> > [flv @ 0x8b67420]Estimating duration from bitrate, this may be inaccurate
> >
> > Can anyone offer and suggestions?
> >
> >
> > BELOW IS THE FULL OUTPUT:
> > FFmpeg version 0.6-4:0.6-2ubuntu6.3, Copyright (c) 2000-2010 the FFmpeg
> > developers
> >   built on Dec 21 2011 18:37:43 with gcc 4.4.5
>
> This version of ffmpeg is too old to be supported on here, please
> update to recent git head. There have been literally thousands of bugs
> fixed since 2010, you must exclude the possibility that one of those
> bug fixes affects the output, before people will look at if the
> current code has a problem.
>
> Apart from that:
>
> You aren't specifying any bitrate or quality options for x264, so you
> are getting the 'defaults' which may not be what you want.
>
> Since the files are already H264, why re-encode the video? (this
> syntax won't work for your current ancient version of ffmpeg)
>
> ffmpeg -i in.flv -c:v copy -c:a aac out.mp4
>
> Cheers
>
> Tom
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>
>


-- 
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Leo Papadopoulos (leo at telecomcto.com)
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