I am a newbie to libav-users and I'm struggling a bit to get something
to work.
I have 2 input files: 1) samples of uncompressed 16 bit audio 2) h.264
compressed frames (with SPS/PPS). The output should be an MP4 file with
AAC audio and the same h.264 video. I've modeled my code after the
output-example.c program in ffmpeg. This is the overview.
raw audio -> avcodec_encode_audio(AAC) -> av_interleaved_write_frame \
\
---> .mp4 output
/
compressed H.264 frames -> av_interleaved_write_frame /
The audio part works correctly, but I am unable to get the video to
play. As you can see, I write the individual H.264 frames directly,
without going through any kind of encoder as I want to preserve the
frame rate/bit rate, etc. The SPS/PPS are also sent to the output as
the first 2 frames. I looked at a standard .mp4 file and it seems that
the size of the frame is output first, then the frame itself. So I
mimicked the output by adding the size of the frame into the output
packet buffer before sending it to av_interleaved_write_frame, but still
no luck.
I know when using ffmpeg to copy the frames instead of encoding that we
should use -vcodec copy? Should my H.264 frames still go through some
kind of copy encoder before sending to av_interleaved_write_frame? If
so, does anyone know how to setup the encoder to just copy the data
instead of encoding it?
Any help or other code samples would be greatly appreciated, I'm stuck.
Michael
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
"email.txt" 18 lines, 1567 characters
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
