[Cin] Blu-ray compliant MPEG-2 SD video with LPCM audio

[Andrew Randrianasulu]

On Monday, November 29, 2021, Terje J. Hanssen via Cin <
cin at lists.cinelerra-gg.org> wrote:

> 2) SD ProRes.mov, 422 (HQ) 10-bit video with LPCM stereo audio :)
>
>
> Den 28.11.2021 22:48, skrev Terje J. Hanssen:
>
>> The source video files I want to convert to Blu-ray compliant MPEG-2 SD
>> video with LPCM audio are:
>> 1) DV25.dv, 720 x 576 (PAL), 50i 4:2:0 video with LPCM stereo audio
>> and
>> 2) SD ProRes.mov, 422 (HQ) 19-bit video with LPCM stereo audio
>>
>> The purpose is to get better MPEG-2 quality using higher (highest)
>> possible bitrate than for DVD video.
>> (Yes, I have tested h.264 via Cin-GG)
>>
>>
>> Here a sample ffmpeg command script found for HD video with PCM (Blu-ray
>> not mentioned):
>> https://gist.github.com/avoidik/153879c06afdcaad8d69b38bcc00abb7
>> # with PCM 16-bit audio (uncompressed), constant video bitrate with
>> specific bitrate tolerance
>>
>> ffmpeg -i "input.mp4" \
>>   -c:v mpeg2video -pix_fmt yuv422p -refs 1 -bf 2 -b:v 50M -maxrate 50M
>> -minrate 50M \
>>   -s 1920x1080 -aspect 16:9 \
>>   -c:a pcm_s16be -f vob \
>>   "output.mpg"
>
>
>>
for SD files replace '-s 1920x1080' with '-s 720x576' or omit this part
{better} .

'-b:v 40M -maxrate 40M -minrate 40M'.  for 40 mbit/s fixed bitrate. for
smaller bitrate just replace numbers.

-f m2ts for mpeg2 transport stream.

most likely remove -pix_fmt part.

-i your file (ffmpeg hopefully will detect its type and codecs
automatically)

keep -c:v mpeg2video part

I do not think you need mp4box for further conversion, as name suggest it
mostly deals {at output end} with mp4 format, not mpeg2 transport stream
(but you mentioned putting pcm in mp4, so I researched this part too)

try tsmuxer (gui) next (not sure if Appimage works for you, if not try
their linux build from their github - tags - assets (there you need to
expand 'assets' arrow/triangle to see various binary and source archives).



>>
>>
>> Suggestion to FFMpeg command to convert the actual SD video files Blu-ray
>> compat?
>> And if  LPCM has to be muxed via MP4(Box) first, a guideline is welcome?
>>
>> ------------------
>> Some Blu-ray technical info and specifications:
>> Video codec  MPEG2 - MP at ML (4:3 or 16:9), MP at HL (16:9)
>> Video frame size 720×576 25 frames interlaced / 50 fields (4:3/16:9)
>> Max video bitrate     40 Mbit/s
>> **BD-R/RE AV SESF, Part 3 (2018):
>> Video Streams:  max. 15 Mbps VBR (MP at ML) and 24 Mbps (MP at HL)
>> Audio codecs LPCM 1.536 Mbps (16 bit, 2 ch), 2.304 Mbps (20, 24 bit)
>> -----------------------
>>
>> Terje J. H
>>
>




>
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