Den 29.11.2021 07:18, skrev Andrew Randrianasulu:
On Monday, November 29, 2021, Terje J. Hanssen <[email protected] <mailto:[email protected]>> wrote:
Den 29.11.2021 02:07, skrev Andrew Randrianasulu:
On Monday, November 29, 2021, Terje J. Hanssen via Cin <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> 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 <https://gist.github.com/avoidik/153879c06afdcaad8d69b38bcc00abb7> <https://gist.github.com/avoidik/153879c06afdcaad8d69b38bcc00abb7 <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"
Andrew,
Thank you for your review and suggestions. I'll put the pieces together tomorrow and start testing with em...
for SD files replace '-s 1920x1080' with '-s 720x576' or omit this part {better} .
Not sure how to treate 720x576 (4:3) with regards to displaying on a 16:9 Widescreen (HDTV), possibly crop the frames next to SD Wide (16:9) "These resolutions are stored anamorphically, i.e. they are stretched to the display aspect ratio by the player or display."
https://superuser.com/questions/907933/correct-aspect-ratio-without-re-encod... <https://superuser.com/questions/907933/correct-aspect-ratio-without-re-encoding-video-file>
=== for MPEG-2, -aspect is useless; you need to use -bsf:v mpeg2_metadata=display_aspect_ratio=4/3 (the only valid values are 4/3, 16/9, 221/100). Even this might not work {...} ====
try to experiment..
'-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)
So any Mpeg2 Profile@Level is neither required as discussed here: https://forum.videohelp.com/threads/345143-mpeg2-MP-ML-with-ffmpeg#post21533... <https://forum.videohelp.com/threads/345143-mpeg2-MP-ML-with-ffmpeg#post2153378>
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)
PCM and ffmpeg was also discussed here https://forum.doom9.org/showthread.php?p=1811816#post1811816 <https://forum.doom9.org/showthread.php?p=1811816#post1811816>
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).
Yep, tsMuxer still launches fine from my Appimage installation. I'll have a look at it later....
======================================= I've tried four ffmpeg tests, 1) -4) below with .m2ts and .mp4 containers I used data rate 25M (comparable with the source dv 25 mbps, compression 5:1) -f m2ts not accepted as format would not copy lpcm audio into any new streams VLC playback the video files OK - without audio Comments and new suggestions welcome ;) =================== du -sh dv28* 470M dv28.dv (the source input file) 452M dv28.m2ts 443M dv28.mkv 443M dv28.mp4 443M dv28.mts ffmpeg -i dv28.dv 2>&1 >/dev/null | egrep "Video|Audio" Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s 1) ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -s 720x756 -c:a pcm_s16be -f m2ts dv28.m2ts [NULL @ 0x557007bcd900] Requested output format 'm2ts' is not a suitable output format dv28.m2ts: Invalid argument 2) ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -s 720x756 -c:a pcm_s16be -f m2ts dv28.mp4 [NULL @ 0x55f3112e3900] Requested output format 'm2ts' is not a suitable output format dv28.mp4: Invalid argument 3) ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -s 720x756 -c:a pcm_s16be -f mpegts dv28.m2ts [mpeg2video @ 0x55bc49d1c040] Automatically choosing VBV buffer size of 372 kbyte [mpegts @ 0x55bc49d1a900] Stream 1, codec pcm_s16be, is muxed as a private data stream and may not be recognized upon reading. ffmpeg -i dv28.m2ts 2>&1 >/dev/null | egrep "Video|Audio" Stream #0:0[0x1011]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 720x756 [SAR 7:5 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc 4) ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -s 720x756 -c:a pcm_s16be -f mpegts dv28.mp4 mpeg2video @ 0x56173fa7e040] Automatically choosing VBV buffer size of 372 kbyte [mpegts @ 0x56173fa7c900] Stream 1, codec pcm_s16be, is muxed as a private data stream and may not be recognized upon reading. ffmpeg -i dv28.mp4 2>&1 >/dev/null | egrep "Video|Audio" Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 720x756 [SAR 7:5 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc ================ Terje J. H