[FFmpeg-user] New MLP Encoder(urgent)

Moritz Barsnick barsnick at gmx.net
Tue Oct 28 16:22:30 CET 2014

Hi greeshma,
you're writing this MLP encoder, right?

On Tue, Oct 28, 2014 at 19:16:20 +0530, greeshma wrote:
> I got the following error
> *** Error in `./ffmpeg': munmap_chunk(): invalid pointer:
> 0x0000000000c75610 ***

You have hit a segmentation fault. Most likely in your own code, but
that's not known at this point. If you have modified the code, and
can't reproduce this with "vanilla" ffmpeg source code, you'll have to
debug by yourself.

> ======= Backtrace: =========
> /lib/x86_64-linux-gnu/libc.so.6(+0x7f4c6)[0x7f5f450a74c6]
> ./ffmpeg[0xd04b2c]
> ./ffmpeg[0x869607]
> ./ffmpeg[0x884d99]
> ./ffmpeg[0x889184]
> ./ffmpeg[0x9dd300]
> ./ffmpeg[0x48a3b3]
> ./ffmpeg[0x46efea]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f5f45049de5]
> ./ffmpeg[0x4714f2]

If you run ./ffmpeg_g instead, you should get a proper stacktrace.

Otherwise, use gdb and possibly valgrind to get to the root of the
problem. Short intros here:


If you don't know how to debug _your own_ code, I can't help you much
further. But a look at a proper stack trace and some general gdb
knowledge will usually help you out.


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