interlace field-pattern=2:2 renders faster video than audio

Thu Apr 18 09:55:46 UTC 2019

media info returns those info:

General

Complete name : spot_i_miei_diritti_video_accelerato.mpg THIS IS THE ONE
WITH FASTER VIDEO

Format : MPEG-PS

File size : 30.4 MiB

Duration : 42 s 264 ms

Overall bit rate mode : Variable

Overall bit rate : 6 041 kb/s

Video

ID : 224 (0xE0)

Format : MPEG Video

Format version : Version 2

Format profile : Main at Main

Format settings : BVOP

Format settings, BVOP : Yes

Format settings, Matrix : Default

Format settings, GOP : Variable

Duration : 42 s 200 ms

Bit rate mode : Variable

Bit rate : 5 697 kb/s

Maximum bit rate : 9 500 kb/s

Width : 720 pixels

Height : 576 pixels

Display aspect ratio : 4:3

Frame rate : 25.000 FPS

Standard : PAL

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Scan order : Bottom Field First

Compression mode : Lossy

Bits/(Pixel*Frame) : 0.549

Time code of first frame : 00:00:00:00

Time code source : Group of pictures header

GOP, Open/Closed : Closed

Stream size : 28.7 MiB (94%)

Audio

ID : 192 (0xC0)

Format : MPEG Audio

Format version : Version 1

Format profile : Layer 2

Duration : 42 s 264 ms

Bit rate mode : Constant

Bit rate : 224 kb/s

Channel(s) : 2 channels

Sampling rate : 48.0 kHz

Frame rate : 41.667 FPS (1152 SPF)

Compression mode : Lossy

Stream size : 1.13 MiB (4%)

and this for the correct playback video:

General

Complete name : spot_linea_verde_febbraio_2014_ok.mpg

Format : MPEG-PS

File size : 25.3 MiB

Duration : 35 s 784 ms

Overall bit rate mode : Variable

Overall bit rate : 5 934 kb/s

Video

ID : 224 (0xE0)

Format : MPEG Video

Format version : Version 2

Format profile : Main at Main

Format settings : BVOP

Format settings, BVOP : Yes

Format settings, Matrix : Default

Format settings, GOP : M=3, N=12

Duration : 35 s 720 ms

Bit rate mode : Variable

Bit rate : 5 592 kb/s

Maximum bit rate : 9 500 kb/s

Width : 720 pixels

Height : 576 pixels

Display aspect ratio : 4:3

Frame rate : 25.000 FPS

Standard : PAL

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Scan order : Bottom Field First

Compression mode : Lossy

Bits/(Pixel*Frame) : 0.539

Time code of first frame : 00:00:00:00

Time code source : Group of pictures header

GOP, Open/Closed : Closed

Stream size : 23.8 MiB (94%)

Audio

ID : 192 (0xC0)

Format : MPEG Audio

Format version : Version 1

Format profile : Layer 2

Duration : 35 s 784 ms

Bit rate mode : Constant

Bit rate : 224 kb/s

Channel(s) : 2 channels

Sampling rate : 48.0 kHz

Frame rate : 41.667 FPS (1152 SPF)

Compression mode : Lossy

Stream size : 978 KiB (4%)

seems the only substantiial differences are the

*Format settings, GOP : M=3, N=12 FOR THE OK FILE*

AND for the faster video playback file:

*Format settings, GOP : Variable*

On Wed, 17 Apr 2019 at 18:54, Federico Allegretti <allegfede at gmail.com>
wrote:

> just to test without a decklink board, this is the modified command thant
> still renders faster video than audio:
> gst-launch-1.0 uridecodebin
> uri=file:///home/v1p3r/Video/temp/spot_i_miei_diritti_video_accelerato.mpg
> name=decode decode. ! deinterlace ! autovideoconvert ! interlace
> field-pattern=2:2 top-field-first=true allow-rff=true ! videoconvert !
> video/x-raw,format=UYVY ! videoscale ! video/x-raw,width=720,height=576 !
> videorate ! video/x-raw,framerate=25/1 ! autovideosink decode. !
> audioconvert !  audio/x-raw, format=S32LE, channels=2 ! audioresample !
> audio/x-raw, rate=48000 ! autoaudiosink
>
> removing the interlace filter with this other command:
> gst-launch-1.0 uridecodebin
> uri=file:///home/v1p3r/Video/temp/spot_i_miei_diritti_video_accelerato.mpg
> name=decode decode. ! deinterlace ! autovideoconvert  ! videoconvert !
> video/x-raw,format=UYVY ! videoscale ! video/x-raw,width=720,height=576 !
> videorate ! video/x-raw,framerate=25/1 ! autovideosink decode. !
> audioconvert !  audio/x-raw, format=S32LE, channels=2 ! audioresample !
> audio/x-raw, rate=48000 ! autoaudiosink
>
> renders a perfect clip on desktop, but i need it exiting from composite
> video out of decklink cards :D
>
>
>
> On Tue, 16 Apr 2019 at 19:13, Federico Allegretti <allegfede at gmail.com>
> wrote:
>
>> hello, i have some videos that have strange behaviour.
>>
>> the command i use to render those clips on am intensity pro is:
>>
>>  gst-launch-1.0 uridecodebin
>> uri=file:///home/v1p3r/Video/temp/spot_i_miei_diritti_video_accelerato.mpg
>> name=decode decode. ! deinterlace ! autovideoconvert ! interlace
>> field-pattern=2:2 ! videoconvert ! video/x-raw,format=UYVY ! videoscale !
>> video/x-raw,width=720,height=576 ! videorate ! video/x-raw,framerate=25/1 !
>> decklinkvideosink mode=3 decode. ! audioconvert !  audio/x-raw,
>> format=S32LE, channels=2 ! audioresample ! audio/x-raw, rate=48000 !
>> decklinkaudiosink
>>
>> but some of them (the one of the example) results in video rendered
>> faster than audio (that is ok in pitch and duration).
>>
>> it do not depends if original footage is interlaced or not:
>> spot_linea_verde_febbraio_2014_ok.mpg is rendered perfect
>> spot_i_miei_diritti_video_accelerato.mpg is faster video than audio ....
>> spot_avis_video_accelerato.mpg is interlaced .... faster video than audio
>> ....
>>
>> those clips are in my mega account if you want to test on your systems
>> (my mega account):
>> https://mega.nz/#F!4pMXmARI!f1DI_GskcknQhs2ZSSTcRg
>>
>>
>> Do someone have an idea of what is appening?
>> I suspect is the interlace field-pattern=2:2 .... but how i can bypass it
>> and still render to the decklink sink?
>>
>> thanks a lot,
>>
>> Federico
>> --
>> Sourceforge: https://sourceforge.net/u/allegfede/
>>
>> YouTube Channel: https://www.youtube.com/c/v1p3rslab
>>
>> VIMEO HD videos: http://www.vimeo.com/user1912745/videos
>>
>
>
> --
> Sourceforge: https://sourceforge.net/u/allegfede/
>
> YouTube Channel: https://www.youtube.com/c/v1p3rslab
>
> VIMEO HD videos: http://www.vimeo.com/user1912745/videos
>

-- 
Sourceforge: https://sourceforge.net/u/allegfede/

YouTube Channel: https://www.youtube.com/c/v1p3rslab

VIMEO HD videos: http://www.vimeo.com/user1912745/videos
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20190418/3b56e71c/attachment-0001.html>