thx matthias for the great hint!
finally got it to work ... now i can render the rgb frames (windowsize)
into a mp4 with x264 (yuv and videosize)!
thx to all!
Am 12.05.2012 20:46, schrieb "Matthias Bühlmann":
check the libavformat/output-example.c (instead of the libavcodec/api-example.c)
following the same steps as in this file (but for mp4 instead of mpeg) i was
able to write an opengl output directly into an mp4 that i could play with
quicktime.
what I didn't manage was to encode packages that i could use as stream as well
as writing them to mp4 file at once (since the mp4 file seems to require a
global header while a stream requires the header to be in the packages or
something like that and the way x264 lib is used by ffmpeg only one or the
other seems to be possible). But that's most likely not what you need so the
libavformat/output-example.c should give you what you need.
-------- Original-Nachricht --------
Datum: Thu, 10 May 2012 18:19:05 +0300
Von: Alex Cohn<[email protected]>
An: "This list is about using libavcodec, libavformat, libavutil, libavdevice and
libavfilter."<[email protected]>
Betreff: Re: [Libav-user] Creating mp4 (h264 codec) video from OpenGL frames
On Thu, May 10, 2012 at 5:16 PM, Alex Druml<[email protected]>
wrote:
hello!
i am currently trying to encode frames (RGB) rendered with opengl into a
mp4
file encoded with h264.
i already managed to convert the frames from RGB to YUV (swscale) and i
use the video_encode_example example from
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=doc/examples/decoding_encoding.c;h=cb63294b142f007cf78436c5d81c08a49f3124be;hb=HEAD
to encode the frames into a h264 file (vlc already plays the file). now
i want to write this encoded file into a common container like mp4.
i found a muxing example here
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=doc/examples/muxing.c;h=9d338dee670699d07b1f87505d78ee52a17cb920;hb=HEAD
but is it possible to write the encoded frames directly into a mp4 file?
best regards!
No, you must conform to mp4 container logic. This is what the muxer is
for.
BR,
Alex Cohn
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