[FFmpeg-trac] #3020(undetermined:new): FFMPEG performance need optimize when transcoding to mjpeg
FFmpeg
trac at avcodec.org
Wed Oct 2 13:31:02 CEST 2013
#3020: FFMPEG performance need optimize when transcoding to mjpeg
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Reporter: kaifu.tang | Owner:
Type: enhancement | Status: new
Priority: normal | Component:
Version: 2.0.1 | undetermined
Keywords: mjpeg | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Changes (by cehoyos):
* keywords: transcoder, mjpeg, avfilter, performance => mjpeg
* component: avfilter => undetermined
Comment:
Please test (and report) all issues with current git head.
Could you elaborate a little on the problem you have? Iiuc, you are
reporting that the msmpeg4 encoder is faster than the mjpeg encoder but I
am not sure that this is a useful explanation / that they can be compared
like this.
An enhancement request for a faster mjpeg encoder is probably valid but I
wonder if this is everything this issue is about...
Note that you cannot avoid the scaling step (the scaler is also
responsible for colour-space conversion), your h264 input sample has a
different colour space than mjpeg (while msmpeg4 has the same as your h264
sample). So if this is your problem, I don't think there is anything that
can be fixed about it.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3020#comment:4>
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