[FFmpeg-user] Preserving PAL 720x576 resolution

[Mark Filipak (ffmpeg)]

On 2021-04-12 06:40, Matthew Yang wrote:
> Hello all
> 
> I was trying to extract a 5-minute segment of a video, keeping the same
> settings using the following command
> 
> ffmpeg -ss 00:00:00 -i "input.mxf" -c copy -t 00:05:00 output.mxf
> 
> However the 'resolution' and 'scan type' of the output differs from the
> original.
> 
> Video (ORIGINAL)
> ID                                       : 2
> Format                                   : JPEG 2000
> Format profile                           : No restrictions
> Format settings, wrapping mode           : Frame
> Codec ID                                 : 0D010301020C0100-0401020203010100
> Duration                                 : 1 h 32 min
> Bit rate                                 : 90.0 Mb/s
> Width                                    : 720 pixels
> Height                                   : 576 pixels
> Display aspect ratio                     : 4:3
> Frame rate                               : 25.000 FPS
> Standard                                 : PAL
> Color space                              : YUV
> Chroma subsampling                       : 4:2:2
> Bit depth                                : 10 bits
> Scan type                                : Interlaced
> Scan order                               : Top Field First
> Bits/(Pixel*Frame)                       : 8.680
> Stream size                              : 58.1 GiB (95%)
> Title                                    : Picture
> 
> Video (OUTPUT)
> ID                                       : 2
> Format                                   : JPEG 2000
> Format profile                           : No restrictions
> Format settings, wrapping mode           : Frame
> Codec ID                                 : 0D010301020C0100-0401020203010100
> Duration                                 : 5 min 0 s
> Bit rate                                 : 58.6 Mb/s
> Width                                    : 720 pixels
> Height                                   : 288 pixels
> Display aspect ratio                     : 4:3
> Frame rate                               : 25.000 FPS
> Color space                              : YUV
> Chroma subsampling                       : 4:2:2
> Bit depth                                : 10 bits
> Scan type                                : Progressive
> Bits/(Pixel*Frame)                       : 11.308
> Stream size                              : 2.05 GiB (96%)
> 
> How do I retain the same settings in my output file? TIA.
> 
> Matthew

Hello Matthew,

Do you want to preserve the interlaced character in the 5 minute segment? Do you understand what 
that means? Do you understand that interlaced is essentially analog TV?

I suggest you combine the 288 line fields to form normal 576 line frames, and then decomb (aka 
"deinterlace") them. That's what's found on DVDs and BDs.

HTH,
Mark.



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