On Saturday, November 13, 2021, Terje J. Hanssen <terjejhanssen@gmail.com> wrote:
Den 10.11.2021 00:39, skrev Andrew Randrianasulu:
On Wednesday, November 10, 2021, Terje J. Hanssen via Cin <cin@lists.cinelerra-gg.org <mailto:cin@lists.cinelerra-gg.org>> 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).
yeah... I posted link to python script supposedly (if I read desc. correctly!) cutting files according to edl. Now one might try it and assemble resulting clips by another ffmpeg command..
Regarding uncompressed PCM audio, FFMPEG looks to not support PCM in MP4; I read only Sony had a solution for that.
heh, it seems one can research this field for day and night)
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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:
good...
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
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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
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(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
well, if you have player (or friend(s) with player(s)) you can try for yourself
i think they have pre-compiled version. Be aware in tsmuxer context DV usually mean Dolby Vision, not dv as dv video codec.
Terje J. H