FS#7943 - FFMPEG should be recompiled with --enable-swscaler

Attached to Project: Arch Linux
Opened by tardo (tardo) - Sunday, 02 September 2007, 23:28 GMT
Last edited by Paul Mattal (paul) - Monday, 21 January 2008, 02:08 GMT
Task Type Feature Request
Category Packages: Extra
Status Closed
Assigned To Paul Mattal (paul)
Architecture All
Severity Low
Priority Normal
Reported Version 2007.08 Don't Panic
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

aka, software image scaling support. Mainly because libmlt should be built with this so that kdenlive stops crashing.

Builds fine on x86_64 and doesn't seem to affect other programs.
This task depends upon

Closed by  Paul Mattal (paul)
Monday, 21 January 2008, 02:08 GMT
Reason for closing:  Implemented
Additional comments about closing:  Included in ffmpeg 20071204-1.
Comment by Skottish (skottish) - Monday, 03 September 2007, 00:25 GMT
swscaler breaks VLC. This is a known issue.
Comment by Skottish (skottish) - Monday, 03 September 2007, 00:41 GMT
It looks like swscaler kills SWFDec also.
Comment by Skottish (skottish) - Monday, 03 September 2007, 02:51 GMT
Sorry, this will be my last post until someone needs something.

VLC 9 does not suffer from the swscaler problem. I built from SVN today (with --disable-qt4), and it plays fine. Next week the VLC people are going to iron out the bugs in the QT interface, then it looks like it's going live.

Swfdec when rebuilt against FFMPEG with --enable-swscaler works. I thought I was seeing some A/V sync issues, but it looks as if it was the test video.
Comment by Paul Mattal (paul) - Tuesday, 09 October 2007, 15:18 GMT
Added in 20071009-1 in testing. Please let me know if this works for you!
Comment by Skottish (skottish) - Sunday, 14 October 2007, 14:56 GMT
This is the first report that I've seen about swscalar breaking VLC at Arch (post 15).

http://bbs.archlinux.org/viewtopic.php?id=38373

I haven't read anything about any patches to VLC < 9.x to fix the swscalar problem. 9.x works fine with swscalar, but it's not good enough to release as a replacement for 8.6.x.
Comment by Paul Mattal (paul) - Monday, 31 December 2007, 03:58 GMT
After a LOT of poking around on this issue, it appears to me that the fact that VLC breaks with swscaler turned on is a bug in VLC not a bug in ffmpeg. This would seem to be evidenced by reports that VLC 9.x does not suffer from this problem.

Otherwise, since it seems like we can't resolve this deadlock by making everyone happy (at least until VLC 9.x is released), I'm planning to release ffmpeg with swscaler turned on this week. It doesn't seem fair to keep the rest of the world waiting on the swscaler feature because of a bug in VLC.

If anyone believes this logic is flawed or any of the facts on which it is based are incorrect, please respond here within a week. Otherwise I'll be releasing the new ffmpeg.

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