Greetings -
Video n00b here…
I’ve been using FFmpeg to encode a sequence of raw RGB frames to a movie file,
in a C/C++ app. I basically took the code from here:
http://ffmpeg.org/doxygen/trunk/doc_2examples_2decoding__encoding_8c-example.html
<http://ffmpeg.org/doxygen/trunk/doc_2examples_2decoding__encoding_8c-example.html>
The video_encode_example() function synthesizes each frame’s data; in my case I
have a data pointer, width, height, and rowbytes, so I just use sws_scale() to
convert to YUV and I’m good to go. So far I’ve been using
AV_CODEC_ID_MPEG2VIDEO. Plays on every movie player I have on my Mac (VLC,
QuickTime Player, etc, etc)
For obvious (?) reasons I want H.264. Swapping in that codec (using x264 or
openh264) gives me a movie. I can play this on a Mac with VLC, but
QuickTimePlayer doesn’t like the format (tries to “convert” and says “QuickTime
Player can’t open <filename>”.
The “file” command gives me back this:
JVT NAL sequence, H.264 video @ L 13
It does not surprise me much that simply dropping in a different codec yields a
movie that can’t be opened by some particular player, given all the possible
format and codec properties/settings.
But, it seems that I should be able to configure the necessary codec and/or
container properties such that I get a movie file that can be opened with a
wider variety of apps (particularly QuickTime Player, given it’s supposed to
support a variety of formats and codecs)
I’m guessing I’m just missing a few settings, but I really don’t know where to
start looking. Any help/advice/pointers/documentation would be greatly
appreciated…
- Philip
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