On 11/1/11 1:07 PM, Evgeny Yakimov wrote:
Hello
I'm trying to open a UDP mpegts stream, and decode it using libavcodec
and ultimately encode it using my own application which uses x264/faac
to encode it directly. I've managed to get this working by reading raw
frames and the encoding part of my application works fine, however
whenever I try to open libav I get seg faults. I've uploaded my code to:
http://pastebin.com/rkFQKMWB
Please let me know if I'm openning the stream incorrectly, note that for
my test case the options pairs are:
'f' => "mpegts"
'u' => "udp://:1500",
ignore the 'l' for now
I'm using avconv to generate the UDP mpegts.
The problem is that the segfault actually occurs in the thread that does
the x264 encoding, I "think" that due to the way I'm using libav, that
its corrupting some of the memory used by the x264 encoding thread.
I have also tried doing this, by commenting out both the :
avcodec_open2 , and the avcodec_decode_audio3 , avcodec_decode_video2
and sending my application blank dummy blank frames / samples. So
basically I receive the blank packets without decoding them and
substituted them with blank "payloads" when I do this I no longer get
the seg faults, which suggests that I'm missusing one of these calls.
Try to run the code in valgrind. If it is memory corruption it will spot
it quickly.
Btw if you are using udp make sure you set the system buffers to be
large enough.
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