On Thu, Mar 02, 2017 at 09:53:02AM +0100, wm4 wrote: > These patches merge the previously skipped Libav commits, which made > avconv lazily initialize libavfilter graphs. This means the filters > are initialized with the actual output format, instead of whatever > libavformat reports. > > It's a prerequisite to making hardware decoding support saner, as > hardware decoders will output a different pixfmt than the software > format reported by libavformat. This can be seen on ffmpeg_qsv.c > and ffmpeg_cuvid.c, which don't lose any functionality, even though > half of the code is removed. > > There are some differences in how ffmpeg.c and avconv.c filter-flow > works. Also, avconv.c doesn't have sub2video. Relatively intrusive > changes were required. > > I will push this tomorrow, except if critical failures are found.
I think the patchset improved in terms of regressions but there are
still several
./ffmpeg -i ~/tickets/3015/test_video -filter:a apad -f flv -vcodec flv -ar
22050 -shortest test.flv
looses the audio stream
also this code crashes with some private files:
==7506== Process terminating with default action of signal 11 (SIGSEGV)
==7506== Access not within mapped region at address 0x8
==7506== at 0x471529: av_buffersink_get_frame_rate (buffersink.c:193)
==7506== by 0x435B54: init_output_stream_encode (ffmpeg.c:3217)
==7506== by 0x4364A8: init_output_stream (ffmpeg.c:3351)
==7506== by 0x42E4DB: reap_filters (ffmpeg.c:1428)
==7506== by 0x43AA44: transcode_step (ffmpeg.c:4452)
==7506== by 0x43AB28: transcode (ffmpeg.c:4496)
==7506== by 0x43B2FD: main (ffmpeg.c:4701)
This one produces a silent audio channel as previous patchsets did too
./ffmpeg -i ~/tickets/1726/Mono.thd out.wav
This one looses the first displayed subtitle (the green "help")
./ffmpeg -i ~/tickets/153/bbc_small.ts -filter_complex '[0:v][0:s]overlay'
-qscale 2 -t 3 test.avi
This one changes timebase
./ffmpeg -i ~/fate-suite/sub/MovText_capability_tester.mp4 -map 0 -scodec
mov_text -f mp4 -movflags frag_keyframe+empty_moov test.mp4
Also some files still require max_muxing_queue_size to be manually set
to not fail
[libmp3lame @ 0x31dbea0] Queue input is backward in time
Too many packets buffered for output stream 0:1.
[libmp3lame @ 0x31dbea0] 5 frames left in the queue on closing
This is worsened by the fact that the user has no hint towards this
option in the error messages
[...]
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Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Complexity theory is the science of finding the exact solution to an
approximation. Benchmarking OTOH is finding an approximation of the exact
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