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View Full Version : Can anyone reproduce this hang?


Blue_MiSfit
2nd July 2010, 11:27
Hey folks,

I'm doing a bunch of test encodes this morning, and I've run across a test case that will reliably cause x264 (rev 1659 x86 from x264.nl) to hang.


This reproduces inside VirtualDub as well, so it's definitely got NOTHING to do with x264. I'm still interested as to what's causing it, as x264 did generate this stream!


Here's a download link - sorry about using Megaupload, but my usual go-to (mediafire) doesn't support sizes over 200MB.
http://www.megaupload.com/?d=23Y9EA0A

Can anyone else reproduce this?

To make x264 hang, I took the source, loaded with DSS2 / DivX H.264, with no other operations in AviSynth. The CLI I used:


x264.exe --preset ultrafast --bitrate 8500 --vbv-maxrate 8500 --vbv-bufsize 8500 --tune film --output NUL x264_80mbps_fastdecode.avs


It always hangs at frame 916 for me. Using x264's built-in FFMS2 results in a perfectly fine transcode.

Thoughts?

It definitely seems related to AviSynth / DivX H.264 / DSS2, since the same AVS will hang VirtualDub, but a native encode with FFMS2 in x264 goes fine.

Derek

Soichiro
2nd July 2010, 14:54
It produces no problem for me. The only difference is that I'm using ffdshow/libavcodec instead of DivX H.264, so I would say the problem most likely lies there.