[FFmpeg-devel] Regression: r20954-5 broke threads auto in libx264

Michael Niedermayer michaelni
Thu Jan 21 00:15:57 CET 2010

On Wed, Jan 20, 2010 at 02:56:48PM -0800, Baptiste Coudurier wrote:
> On 01/20/2010 02:53 PM, Michael Niedermayer wrote:
>> On Wed, Jan 20, 2010 at 11:46:05PM +0100, Michael Niedermayer wrote:
>>> On Wed, Jan 20, 2010 at 01:27:34PM -0800, Jason Garrett-Glaser wrote:
>>>> On Wed, Jan 20, 2010 at 1:25 PM, Baptiste Coudurier
>>>> <baptiste.coudurier at gmail.com>  wrote:
>>>>> On 01/20/2010 01:13 PM, Jason Garrett-Glaser wrote:
>>>>>> -threads 0 now no longer works to specify auto threads in libx264.  We
>>>>>> have received a ton of complaints from users already about ffmpeg
>>>>>> performance going down massively in the past few weeks.
>>>>>> This is a serious regression.
>>>>>> If nobody can come up with a reasonable fix for this in the next day
>>>>>> or two, I will disconnect the threads option in libx264.c, forcing it
>>>>>> to auto in all cases.
>>>>> I very strongly object to using auto in all cases.
>>>> I would too.  Here's my order of preference:
>>>> 1) Auto is default, user can specify if he wants something else.
>>> i agree but until ffmpeg itself supports auto there can be no
>>> default=auto
>>> because the default should match between encoders and the default
>>> should work.
>>> This needs a volunteer to implement auto thread support in ffmpeg.
>> Iam really not happy about libx264 and the rest of ffmpeg behaving
>> quite differently. I dont mind seriously on a temporary scale but i
>> definitly would prefer that we work toward keeping their defaults
>> the same and not making them more different
> Well, maybe it's the right time to improve ffmpeg defaults ?
> I would be ok with that.

iam happy with whatever defaults the people prefer


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

When you are offended at any man's fault, turn to yourself and study your
own failings. Then you will forget your anger. -- Epictetus
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20100121/f24781fb/attachment.pgp>

More information about the ffmpeg-devel mailing list