Hello,
while i hav ealso some problems to undertsand thid correct i would be
very interested if there is also a link to this example " how to encode
a video file with libx264" (could not find it in the ffmpeg sources)
thanks
Georg
Am 04.04.2015 um 01:47 schrieb Info || Non-Lethal Applications:
Hi,
On 04 Apr 2015, at 01:36, robotanarchy <[email protected]
<mailto:[email protected]>> wrote:
Hello libav-users,
I'm just getting started with using libav and it is hard to find any
sample code, except for what is in the doc/examples folder of the
source tree [1].
More specifically, I'd like to create a RTP video streaming server in C.
The closest thing to an example code was this [2] on stackoverflow -
but it is said not to work well and also it doesn't compile with the
latest ffmpeg.
I've also tried to fork ffserver, but it also won't compile outside of
the ffmpeg source tree. Its main file, ffserver.c [3], has this infront
of most of the header files:
// FIXME those are internal headers, ffserver _really_
shouldn't use them
...so this also doesn't seem to be a good starting point either. I'm
wondering if such an RTP server is even possible without these internal
headers.
If it is, can someone please provide some readable example code, that
does nothing but serve a video over RTP?
Kind regards,
robotanarchy
We just did that recently and it worked quite well (we were streaming a
live video source to an iPhone).
For a very basic approach, you can simply look for examples on how to
encode a video file with libx264.
All you need to do make RTP work is set the output URL as you would
normally set a file.
Here’s a short snippet:
_pVideoOutputFmt= av_guess_format("rtp", NULL, NULL);
_pVideoFormatCtx= avformat_alloc_context();
avformat_alloc_output_context2(&_pVideoFormatCtx, _pVideoOutputFmt,
"rtp", _url.c_str());
/* open the output file, if needed */
if (!(_pVideoOutputFmt->flags & AVFMT_NOFILE))
avio_open(&_pVideoFormatCtx->pb, _url.c_str(), AVIO_FLAG_WRITE);
And don’t forget to do a avformat_network_init(); or else RTP won’t work.
Hope this helps getting you started!
Best regards,
Flo
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