On Fri, 24 Mar 2017 18:53:41 +0100 Michael Niedermayer <mich...@niedermayer.cc> wrote:
> On Fri, Mar 24, 2017 at 01:47:10PM +0100, wm4 wrote: > > async_mutex has is used in a very strange but intentional way: it is > > locked by default, and unlocked only in regions that can be run > > concurrently. > > > > If the user was calling API functions to the same context from different > > threads (in a safe way), this could unintentionally unlock the mutex on > > a different thread than the previous lock operation. It's not allowed by > > the pthread API. > > > > Fix this by emulating a binary semaphore using a mutex and condition > > variable. (Posix semaphores are not available on all platforms.) > > --- > > libavcodec/pthread_frame.c | 41 +++++++++++++++++++++++++++++++---------- > > 1 file changed, 31 insertions(+), 10 deletions(-) > > this breaks flac > > make -j12 ffmpeg && ./ffmpeg -i ~/tickets/4421/testwav_cut.wav out.flac ; > ./ffmpeg -i out.flac -f null - > https://trac.ffmpeg.org/attachment/ticket/4421/testwav_cut.wav > > Input #0, flac, from 'out.flac': > Metadata: > ENCODER : Lavf57.67.100 > Duration: 00:00:10.00, start: 0.000000, bitrate: 912 kb/s > Stream #0:0: Audio: flac, 44100 Hz, stereo, s16 > Stream mapping: > Stream #0:0 -> #0:0 (flac (native) -> pcm_s16le (native)) > Press [q] to stop, [?] for help > Output #0, null, to 'pipe:': > Metadata: > encoder : Lavf57.67.100 > Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s > Metadata: > encoder : Lavc57.86.103 pcm_s16le > Assertion ret <= avpkt->size failed at libavcodec/utils.c:2507 > Aborted > > [...] I get: testwav_cut.wav: Invalid data found when processing input Can't reproduce. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
