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

[Federico Allegretti]

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

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[Federico Allegretti]

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 <[hidden email]> 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

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[Federico Allegretti]

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@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@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 <[hidden email]> 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 <[hidden email]> 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

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