Den 10.11.2021 00:39, skrev Andrew Randrianasulu:
On Wednesday, November 10, 2021, Terje J. Hanssen via Cin
<[email protected] <mailto:[email protected]>> wrote:
As this source file is a 10-bit 422 video with pcm audio, I think
the following render setup could fit automatic:
Setting Format: rgb(a)-float color model
Render File Format: FFMPEG mp4
Video compression: h264-10bit.mp4 user opti. h265-10bit.mp4
Pixels : yuv422p10le
Bitrate: ?
Quality: ?
Preset: Medium default w/i.e user purpose adjustment faster/slower
Audio: would it be possible and compliant to have the option to
just copy the source PCM audio?
well, I do not think cinelerra can just pass original audio untouched (
May be this can be coded, but IMO Cin's main focus was on
re-processing input audio and video, not just cutting. Also, input
sources for one session can vary... {this one is less of problem, just
so far there is no 'guess' table that can be used for setting up
parameters from already-known at encoding time session params}. Maybe
encoding profiles can be used for this, need to look..
Possibly I thought merely on just "ffmpeg first input" and "ffmpeg
output" (and Cin just as a gui front end).
Regarding uncompressed PCM audio, FFMPEG looks to not support PCM in
MP4; I read only Sony had a solution for that.
---------
However I got FFMPEG to copy PCM when I transmuxed to MKV container at
the same time as the video part was transcoded to x265:
ffmpeg -i hd01.mov -c:a copy -c:v libx265 hd01_pcm_x265.mkv
du -sh hd01.mov hd01_pcm_x265.mkv
1,7G hd01.mov
176M hd01_pcm_x265.mkv
----------
ffmpeg -i dv01.dv -c:a copy -c:v libx265 dv01_pcm_x265.mkv
du -sh dv01.dv dv01_pcm_x265.mkv
2,0G dv01.dv
209M dv01_pcm_x265.mkv
------------------------
(Another one for "home-made HD videos" on Blu-ray discs (BDAV):
Will it be possible to record (copy) source 1080iHDV.m2t files
(video and audio) to the BD-R(E) discs?)
I was thinking about integrating tsMuxer but this does not solve
problem about unavailability of pre-encoded packets in cin's vframe
for mpeg2.. Probably BC_COMPRESSED type should be split for
mjpeg/dv/mpeg2/h264 types but this is larger rework than I can attempt
from tablet ...
If tsMuxer (or another dedicated utility) could author a BDAV Blu-Ray
for burning on BD-RE disk (and DVD-R), this could make it possible to
preserve and test playabilty compliance of DV SD and MPEG-2 HD(V)
streams content on the same disc, as described in these papers:
Blu-ray Disc, Rewritable Format, Audio Visual Application Format
Specifications for BD-RE Version 2.1, March 2008:
Figure 3.1.4.2.3: Stream file and Clip Information file for DV in BDAV
directory
http://www.blu-raydisc.com/Assets/Downloadablefile/BD-RE_Part3_V2.1_WhitePaper_080406-15271.pdf
Blu-ray Disc Association. UDF2.5. 25/50GB. BDAV. As of December 2016.
ROM4.0. Ultra HD Blu-ray™. ROM. Part3. V3.1. ROM. Part2. V2.0. ROM.
Part1. V2.0. BDMV.
http://www.blu-raydisc.info/docs/Spec_Info/AllBooksDecember2016.pdf
Terje J. H
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