Is 1080p compliant

Blu-ray and UHD Authoring
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Markus1970
Posts: 17
Joined: Tue May 04, 2021 9:51 pm

Is 1080p compliant

Post by Markus1970 »

I've recently encoded some 1080p clips and I wanna make them bluray compliant.

I've read here that using the switch fake interlaced should make it compliant.

http://www.x264bluray.com/home/1080i-p
x264 --bitrate XXXXX --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --fake-interlaced --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 1 -o out.264 input.file

x264 --bitrate XXXXX --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --fake-interlaced --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 2 -o out.264 input.file

I havnt downloaded Blu-Disc Studio yet but does the software convert the video clips to the above, Id like to keep the 1080p and not convert to 1080i.
Or would I need to use. 264 or ffmpeg etc.

Alexey Kolesnikov
Posts: 130
Joined: Fri Mar 01, 2013 1:03 pm
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Re: Is 1080p compliant

Post by Alexey Kolesnikov »

I havnt downloaded Blu-Disc Studio yet but does the software convert the video clips to the above
Blu-Disc Studio does not convert video.
1080p 25fps is not supported by BD standard. Thus, you should convert it to 1080i anyway.

Alternatively you can use any video editing software that allows to change the source frame rate of the video (EDIUS/Premiere/VEGAS) and transcode your video to 23.976p.
The way how this can be done using EDIUS:
1) add your MP4 video to the assets
2) in the assets list click on the framerate cell of your video (25fps) and select 23.976fps in a drop-down
3) drag'n'drop your video to the time line and export (encode) it using the Blu-ray 1080p profile
4) re-encode your audio with eac3to -25.000 -slowdown
Best regards,
Alexey Kolesnikov

Markus1970
Posts: 17
Joined: Tue May 04, 2021 9:51 pm

Re: Is 1080p compliant

Post by Markus1970 »

After some digging around on forums etc i have found this works quite well below for progessive footage, works well in my old LG bluray player.

25p

.\x264 --bitrate 20000 --preset veryslow --bluray-compat --ref 4 --tune film --direct auto --b-adapt 1 --demuxer lavf --fps 25 --b-pyramid none --weightp 1 --open-gop --qpmin=0 --aud --nal-hrd vbr --pic-struct --vbv-bufsize 30000 --keyint 25 --min-keyint 1 --vbv-maxrate 35000 --threads auto --level 4.1 --slices 4 --thread-input --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --fake-interlaced --sar 1:1 --pass 1 -o Output.264 input.mp4

30p

.\x264 --bitrate 20000 --preset veryslow --bluray-compat --ref 4 --tune film --direct auto --b-adapt 1 --demuxer lavf --fps 30 --b-pyramid none --weightp 1 --open-gop --qpmin=0 --aud --nal-hrd vbr --pic-struct --vbv-bufsize 30000 --keyint 30 --min-keyint 1 --vbv-maxrate 35000 --threads auto --level 4.1 --slices 4 --thread-input --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --fake-interlaced --sar 1:1 --pass 1 -o Output.264 input.mp4

And if the audio is out you can use a program called Reaper and import the Input video and Audio and zoom in and match them up exactly.

Some usefull FFMEG commands

Video only
ffmpeg -i xxxx.m2ts -vcodec copy -an xxxx.mp4

Audio only
ffmpeg -i xxxx.mp4 -vn xxxx.AC3

Convert a Wav to AC3
ffmpeg -i xxxx.wav -codec:a ac3 xxxx.ac3

I also recommend Topaz AI video enhancer to upscale SD to HD or 4K

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