ffmpeg encoding mp4 10bit h264

[marcorocchini]

Hi

please patience wiht the cat : thanks.

My example interlaced 8bit source: from this source I need to do a encoding mp4 with:

https://www.swisstransfer.com/d/a5ae256e-f303-4efd-a901-3c730ae0c370

interlace tff
422
mbaff
10bit

clip out have to be exactly in sync frame by frame with the source

I try:

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv422p10le -c:v libx264 -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out.mp4

but I have this problem:

I'm not able to insert in the commanline a sort of:

in_range=tv:out_range=tv

and seems that the out clip is not in sync with the source

How I can do ?

and maybe seems it be another question: I try to encode using

-pix_fmt yuv420p10le

and

-pix_fmt yuv422p10le

seems that when I encode in 422 the video sync is ok but playing in vlc show a bad range (limited/clamped?)
and when I encode in 420 sync is not ok but range is ok

can it be?

[ProWo]

I'm not able to insert in the commanline a sort of:

in_range=tv:out_range=tv

Why do you want to insert that?
That way, the color range remains unchanged.

[marcorocchini]

for the question -pix_fmt yuv420p10le/yuv422p10le

I'm confused cat

[marcorocchini]

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv420p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out420.mp4

https://www.swisstransfer.com/d/d8253104-bb67-4d51-85b6-83f5ef101dc5


I upload the 2 different encoding: vlc seems to show a bad result on out422.mp4 like a levels range error. But both files imported in Edius seems ok

so I cannot understand exactly where is the problem

[ProWo]

Try

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -c:v libx264 -pix_fmt yuv422p10le -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

[marcorocchini]

my vlc plays out422.mp4 that seems an incorrect levels range, black seems too stretched: this maybe not a problem (Edius play correctly) but I try to understand if only my local problem or an abjective question

and again, the

-vf scale=interl=1

when is really necessary?

[marcorocchini]

in attachement the first frame of the video that I see with vlc: the 422 seems with range levels wrong

it's not a important difference but is visible wrong.

Comparing frame to frame in timeline with Edius they are almost exactly and I think they are coded ok (?) but I try to understand why with VLC the playback is not correct

[pandy]

This is how i pass parameters to libx264:

@setlocal
@rem skrypt h264 IP wylaczone psy quasi intra
@set FFMPG=%CD%;C:\FF

@set PATH=%FFMPG%;%PATH%

@set qp=16
@set key=9

@set filename=%1

@set vproc="null"

@SET x264opts="qp=%qp%:keyint=%key%:ref=3:rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=off:overscan=show:colorprim=smpte170m:transfer=smpte170m:colormatrix=smpte170m:stitchable=0:sliced_threads=0"

@ffmpeg -hide_banner -v 32 -stats -y -an -sn -dn -i %filename% -vf %vproc% -c:v libx264 -x264opts %x264opts% -x264-params %x264opts% -f matroska "%~n1_qp%qp%_key%key%.mkv"

@endlocal
@pause

[marcorocchini]

I try

ffmpeg2025\ffmpeg.exe -threads 12 -y -i e:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -x264opts "rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=off:overscan=show:colorprim=smpte170m:transfer=smpte170m:colormatrix=smpte170m:stitchable=0:sliced_threads=0"             -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

but playing out422.mp4 in VLC the video appears with a sort "worng range level"

also using

ffmpeg2025\ffmpeg.exe -threads 12 -y -i e:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -x264opts "rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=off:overscan=show:colorprim=bt709:transfer=bt709:colormatrix=bt709:stitchable=0:sliced_threads=0" -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

playback on VLC show the back a litle crushed.

When encoding hase done 420 is all ok, when is yuv422p10le I get a visually bad result playback: however when imported in the editor seems ok.

But the incorrect playback on vlc confuses the cat's, already confused

[marcorocchini]

I also have try

ffmpeg.exe -threads 12 -y -i e:\c0021.mxf -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=pc,colormatrix=bt709:bt470bg,colorspace=bt709:iall=bt601-6-625:fast=0 -colorspace 2 -color_primaries 2 -color_trc 3  -c:v libx264 -x264opts "rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=on:colorprim=bt709:transfer=bt470bg:colormatrix=bt709:stitchable=1:sliced_threads=0" -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

but not work

[pandy]

Try:

profile=high10:tff=1:interlaced=1:fullrange=off:colorprim=bt709:transfer=bt470bg:colormatrix=bt709

[marcorocchini]

I have tryed but maybe I don't have find the desider result.

I try to export the C0021.MXF using Edius with the output format MXF AVC 10bit and seems this is the correct resultant MXF

https://www.swisstransfer.com/d/144cac06-5a0b-4b13-9df3-81ec086c93b6

MediaInfo says it's a Full range

however I try to understand if is there a way to encode in mp4 with levels like the above: using vlc the black level seems ok

[rgr]

Add -color_range 0 (or -color_range pc).

Or

in_range=pc:out_range=tv

and -color_range=1

[marcorocchini]

I try

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -pix_fmt yuv422p10le -vf scale=interl=1:in_range=limited:out_range=full,colormatrix=bt709:bt470bg,colorspace=bt470bg:iall=bt601-6-625:fast=0   -c:v libx264 -x264opts "rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=off:colorprim=bt709:transfer=bt470bg:colormatrix=bt470bg:stitchable=0:sliced_threads=0" -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

but seems is not ok because comparing frame to frame in Edius the original clip show the correct levels, but the out422.mp4 not. However VLC plays ok.

also I try:

ffmpeg.exe -threads 12 -y -i v:\c0021.mxf -pix_fmt yuv422p10le -vf scale=interl=1:in_range=pc:out_range=tv,colormatrix=bt709:bt470bg,colorspace=bt470bg:iall=bt601-6-625:fast=0 -color_range 1 -c:v libx264 -x264opts "rc_lookahead=5:bframes=0:me=hex:no_chroma_me=1:subme=6:cabac=1:tff=1:interlaced=1:no_scenecut=1:no_psy=1:trellis=0:no_deblock=1:no_psnr=1:no_ssim=1:open-gop=0:pic_struct=1:aud=1:nal_hrd=vbr:force_cfr=1:fullrange=off:colorprim=bt709:transfer=bt470bg:colormatrix=bt470bg:stitchable=0:sliced_threads=0" -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

but also in this case, frame to frame in Edius is not showing the same levels. VLC show levels wrong during play

[rgr]

Do you know that you are changing the color space from BT709 to BT601? Also, you replaced in_range with out_range, so it can't be correct.
And -x264opts is deprecated, may not work.

[pandy]

And -x264opts is deprecated, may not work.

That's why i recommend to:

-c:v libx264 -x264opts %x264opts% -x264-params %x264opts%

[marcorocchini]

oh my cat

however I try also

ffmpeg.exe -threads 12 -y -i v:\c0021.mxf -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=limited,format=yuv422p10le -colorspace bt709 -color_range 2 -c:v libx264 -x264opts fullrange=off:colorprim=bt709:transfer=bt709:colormatrix=bt709 -bsf:v h264_metadata=video_full_range_flag=1 -x264-params "fullrange=on:colorprim=bt709:transfer=bt709" -g 33 -bf 2 -crf 19 -flags +ildct+ilme -top 1 -c:a aac -strict -2 -b:a 450k -ar 48000 -aspect 16:9 v:\out422.mp4

in Edius confronting clip to clip ok. But playback on VLC have the black "stretched": levels not ok

what can it be?

[rgr]

ffmpeg -i C0021.MXF -c:v libx264 -preset slow -crf 17 -pix_fmt yuv422p10le -x264-params interlaced=1 -filter_complex "[0:1] [0:2] amerge" out.mp4

1. Your source is marked as limited, but luma goes beyond the range. If you want a perfect copy, you don't convert the ranges. If it is to be fine (and not a 1:1 copy), then you should play with the range.
2. Why do you encode up to 10 bits if the source is 8-bit?

If it is playing badly, this is rather a player problem.

[rgr]

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv422p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out422.mp4

ffmpeg.exe -threads 12 -y -i c:\c0021.mxf -filter_complex "[0:1] [0:2] amerge" -pix_fmt yuv420p10le -vf scale=interl=1:in_range=tv:out_range=tv -c:v libx264 -crf 28 -x264-params profile=high10 -crf 18 -flags +ildct+ilme -top 1 -an -aspect 16:9 v:\out420.mp4

https://www.swisstransfer.com/d/d8253104-bb67-4d51-85b6-83f5ef101dc5


I upload the 2 different encoding: vlc seems to show a bad result on out422.mp4 like a levels range error. But both files imported in Edius seems ok

so I cannot understand exactly where is the problem

I checked in Vegas -- both videos have the correct colors and the audio is synced.
Apart from the fact that they exceed the limits, of course.
https://gcdnb.pbrd.co/images/xb1KpkEBsUV4.png?o=1

[rgr]

And I think you're combining the wrong audio tracks.

https://gcdnb.pbrd.co/images/C7ACuNgrrr3b.png?o=1

Big difference between both channels.