[gst-devel] Deinterlaced video seeking

[Gregory Petrosyan]

2010/4/22 Sebastian Dröge <sebastian.droege at collabora.co.uk>:
> On Thu, 2010-04-22 at 16:20 +0200, Edward Hervey wrote:
>> On Thu, 2010-04-22 at 17:33 +0400, Gregory Petrosyan wrote:
>> > I am building an application that should be able to show interlaced 25
>> > fps DV video as deinterlaced 50 fps one. I have no problem using
>> > "deinterlace" component, and gst-inspect shows that source pad of it
>> > gives me 50 fps video indeed.
>> >
>> > (Pipeline looks like "filesrc ! queue ! decodebin ! ffmpegcolorspace !
>> > deinterlace ! ffmpegcolorspace ! autovideosink").
>> >
>> > As I understand, "seek" travels up the pipeline, until it reaches
>> > "dvdec" or something like that, and it can only seek with 25-fps
>> > accuracy, because it knows nothing about deinterlacing. What should I
>> > do to be able to seek this video with 50-fps accuracy?
>>
>>   It should work with the GST_SEEK_FLAG_ACCURATE flag in your seek
>> event, which will make your seek nano-second accurate.
>>   The only problem is that I just checked deinterlace, and it doesn't
>> properly drop buffers before that seek point, but the videosink will
>> take that into account and properly display starting from the position
>> you requested.
>>
>>   So, for displaying, the accuracy will work as expected, but for some
>> other uses it might not.
>
> My local version of deinterlace clips the output to the configure
> segment. I'll push this change after gst-plugins-good is open for commit
> again.
>
> Then it will work for displaying and all other use cases.

Thanks! Should I use the latest git GStreamer with your patch applied,
or are e.g. OSSBuild  and Ubuntu versions OK too? (OSSBuild has
0.10.28 -base and 0.10.21 -good, same for Ubuntu).

                Gregory