FFMPEG: convert HDtoIMX and viceversa

[marcorocchini]

Add -map 0:0 after the ffmbc inputs to specify that you are using the piped video

oh my ***

[marcorocchini]

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[Attachment 30541 - Click to enlarge]

[marcorocchini]

ffmpeg -y -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0104.MXF -vf colormatrix=bt709:bt601 -map 0:0 -acodec pcm_s24le -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 thisdontvibrate.mxf

adding the -map 0:0 it don't vibrate and seems ok

without the -map 0:0 image vibrate :=)

[marcorocchini]

but seems to me that the 2° adding colormatrix in ffmbc results in wrong levels, seems to me that using only one colormatrix 709-->601 in ffmpeg is correct

ffmpeg -y -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -sws_flags lanczos+accurate_rnd -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0104.MXF -map 0:0 -acodec pcm_s24le -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 output20.mxf

I have add the -sws_flags lanczos+accurate_rnd that is almost equal the -sws_flags lanczos but final image seems a little less detailed, is there a way to have more details avoiding the use of sharp?

[marcorocchini]

about the colormatrix:

this is original camera-recording of the broadcast bars IMX: https://www.dropbox.com/s/v8tzb23ytsyrbc4/barsIMX.MXF?dl=0

and this the HD bars: https://www.dropbox.com/s/06ixtq6rr8slth4/barsHD.MXF?dl=0

applying

ffmpeg -y -i barsHD.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -sws_flags lanczos+accurate_rnd -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i barsHD.MXF -map 0:0 -acodec pcm_s24le -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 barsHDtoIMX.mxf

seems to me that the new barsHDtoIMX.mxf is (almost) identical to the barsIMX.mxf that is the original recording bars IMX (SD) or the camera

[poisondeathray]

I retested it and it doesn't matter, as long as you have 1 instance (either before or after) of colormatrix

But in the past, there was a problem with ffmpeg's colormatrix filter (quality was lower than ffmbc's for some reason), and both were worse than avisynth's colormatrix despite using the same code for some reason

I have add the -sws_flags lanczos+accurate_rnd that is almost equal the -sws_flags lanczos but final image seems a little less detailed, is there a way to have more details avoiding the use of sharp?

-vf interlace will apply low pass (vertical blur) by default. But if you disable it the lowpass, then you get more line twittering
https://ffmpeg.org/ffmpeg-filters.html#interlace

[marcorocchini]

-vf interlace will apply low pass (vertical blur) by default. But if you disable it the lowpass, then you get more line twittering
https://ffmpeg.org/ffmpeg-filters.html#interlace

yes, too twittering (and doubled duration)

is there another method to interlace but having more detail?

[poisondeathray]

You already went through about 20 different variations on methods to resize and re-interlace +/- lowpass. Check the old threads.

For ffmpeg-only filters, the only 2 options were -vf interlace, and -vf tinterlace. If you recall you didn't like either

You have to live with "not as sharp", for interlace material during motion. This was already discussed several times

[marcorocchini]

in ffmpeg I have found only unsharp filter, but I cannot find a "sharpen" filter :=(

[poisondeathray]

in ffmpeg I have found only unsharp filter, but I cannot find a "sharpen" filter :=(

unsharp is the sharpen filter in ffmpeg. It can sharpen or blur. (+) values sharpen , (-) values blur

https://ffmpeg.org/ffmpeg-filters.html#unsharp-1

[marcorocchini]

https://www.dropbox.com/s/tvcw60evf4eyey8/C0058.MXF?dl=0

ffmpeg -y -i C0058.MXF -vf yadif=1:tff,scale=720:576,unsharp=luma_msize_x=3:luma_msize_y=3:luma_amount=0.8,colormatrix=bt709:bt601,interlace -sws_flags lanczos+accurate_rnd -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0058.MXF -map 0:0 -acodec pcm_s24le -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 C0058HDtoIMX.mxf

thanks poison