Before reporting a bug, please consider the following items:
FFmpeg is in a state of perpetual development. As such, if you wish to query or report a bug, you must try with the latest development branch revision of FFmpeg to confirm the issue still exists.
When writing your bug report, please include (uncompressed):
ffmpegcrashed, see the gdb and valgrind output below" or "The output video was all green")
ffmpeg -i input.mov -an -vcodec foo output.avi")
ffmpeg -v 9 -loglevel 99 -ifollowed by the name of your input file (copy/pasted from the console, including the banner that indicates version and configuration options), paste
ffplayoutput only if your problem is not reproducible with ffmpeg.
You can use the
-report option or define the
FFREPORT environment variable (to any value) to get the exact
command line and the full verbose console output in a file named
ffmpeg-*.log in the current directory.
Note that the
-report option is recent, it will not help
tracking regressions in old revisions.
If you encounter a crash bug, please provide the
backtrace and disassembly, and if possible the
using the the
ffmpeg_g debug binary.
gdb, proceed as follows:
gdb, type 'r' for run, along with the rest of the
ffmpeg command line:
r <rest of command line>
(Alternatively, you can run
gdb --args ffmpeg_g <rest of command
line> and just type 'r' at the
gdb encounters its problem, run the following commands and
copy/paste the output into your bug report:
bt disass $pc-32,$pc+32 info all-registers
gdb versions, use
disass $pc-32 $pc+32.
valgrind, run the following command and copy/paste the
output into your bug report:
valgrind ffmpeg_g <rest of command line>
Once you have gathered this information, you can submit a report to the FFmpeg bug tracker. Note, you must register there first before you can submit a report. You should provide all information so that anyone can reproduce the bug. Please do not report your problem on the developer mailing list: Only send bug reports there if you also intend to provide a fix.
The developers may ask you to provide a sample media file illustrating your problem. In this case, please follow these steps:
and then upload small-sample-file rather than sample-filedd if=sample-file of=small-sample-file bs=1024 count=10000
Important: Movie files which have been compressed (rar,7z,gzip,...) will be deleted without being examined unless they are raw RGB/YUV/PCM. Furthermore movie files uploaded to services like megaupload, rapidshare or any other similar service will be ignored. We are not willing to spend our time fighting with this ridiculous, bloated and spam-filled crap.