[x264-devel] Issues with intra refresh?
Robert Logue
robert.logue at openwave.com
Thu Jan 12 17:37:11 CET 2012
Hello,
When I was running a test harness to go to youtube and download random
videos and transcode I found an issue. The issue is with intra-refresh
turned on libx264 gives back different video for the same input video
and params. This only seems to occur when the 1 process does multiple
transcodes of the same file.
To test this I altered the x264.c file to transcode the same input file
twice and as output I got two different video files different file size
and different frame data.
The command I used was
/spare/x264/install/bin/x264 --preset=veryfast --bitrate=300
--tune=zerolatency --profile=baseline --intra-refresh --vbv-maxrate=300
--vbv-bufsize=12000 --ipratio=0.4 --qpmin=10 -o ./output.mp4 ./input.mp4
and the video can be found here
http://199.91.152.89/nhnunbt586kg/5xzsdnshfcgj459/tram.mp4
Note the video was downloaded by a random test harness and is quiet
offensive. If possible it should not be watched and if watched the sound
should be turned down.
I was on the web chat earlier and the guys on there indicated that this
could be a bug. Is there any where else to raise this or is here ok?
Thanks
Robert
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