[FFmpeg-trac] #1882(avcodec:open): Multi-threading wmv encoder
FFmpeg
trac at avcodec.org
Mon Nov 5 00:21:50 CET 2012
#1882: Multi-threading wmv encoder
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Reporter: txspaderz | Owner:
Type: enhancement | Status: open
Priority: wish | Component: avcodec
Version: git-master | Resolution:
Keywords: wmv2 | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by xnejp03):
Hi, I'm the author of the software. wmv2 is the only wmv-based encoder
that FFmpeg supports, and is needed for on-the-fly transcoding for Xbox
(among others). The encoder doesn't support -threads with value other than
1. It's a major bottleneck, especially for HD videos. I'm not sure multi-
threaded VC1 decoder will help, as the same will happen when transcoding
(for example) MKV/H264 HD file.
I appreciate wmv2 is deprecated, but this would really help a lot, unless
there is a chance of wmv3 encoder.
Regarding -copyts: it's an attempt to keep audio/video in sync, but it
might be completely inappropriate, the documentation on this parameter is
a bit scarce :-)
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1882#comment:7>
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