[FFmpeg-devel] 4:2:0 DV25 file wrongly identified as 4:1:1

Niobos niobos
Wed Sep 22 10:17:02 CEST 2010

On 2010-09-21 15:19, Dave Rice wrote:
> On Sep 21, 2010, at 7:39 AM, Niobos wrote:
>> On 2010-09-21 12:04, Michael Niedermayer wrote:
>>> On Fri, Sep 03, 2010 at 02:06:13PM +0200, Niobos wrote:
>> Patch is tested on two sample 4:2:0 files. I don't have a 4:1:1 clip to
>> test it against.
> If it helps, here's a some 4:1:1 DV from the Internet Archive:
> http://www.archive.org/download/TripTheLightPromo2/DanceTest2.mov ('dvc ')
> http://www.archive.org/download/ThroughtTheFirstBoca/ThroughFirstBoca.avi ('dvsd', DVCPRO)
> http://www.archive.org/download/Timothy_Leary_Archives_237_.dv/237_.dv (DVCPRO)

I ran this ffmpeg command on all three:
ffmpeg -i "$f" -vcodec libx264 -vpre hq -b 1000k -acodec copy "$f.mkv"

ffmpeg tells me the streams are "yuv411p", and from what I can tell
visually, they are correctly transcoded (and thus detected). I.e.
they're not scrambled as would have happened if they would be wrongly
detected as 4:2:0.


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