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

Niobos niobos
Tue Sep 21 13:39:17 CEST 2010

On 2010-09-21 12:04, Michael Niedermayer wrote:
> On Fri, Sep 03, 2010 at 02:06:13PM +0200, Niobos wrote:
>> The reason why I'm raising this issue here (as well as with the tool
>> that produced the file), is that a simple fix (attached) will:
>> * make ffmpeg work for our production system
>> * conform to the original comment (which is now lost) by checking the
>> APT flag instead of the AP1 flag.
>> Obviously, this change may break DV decoding if the current behaviour is
>> desired. I'm no expert on the DV format, comments and insights are welcome.
>>  dvdata.c |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 24b14fe94c5cfd32b6d52ee8660360dc63f67594  dv25-wrongly-identified-as-411.patch
> as noone wants to maintain dv ...
> patch should be ok if tested & passes fate 

Patch is tested on two sample 4:2:0 files. I don't have a 4:1:1 clip to
test it against.

make fate passes on my machine (output attached). Most notably, these
test succeed: vsynth{1,2}-dv{,50}, lavf-dv_fmt, seek-dv{411,50,}_dv,

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