On Tuesday, November 30, 2021, Terje J. Hanssen <[email protected]> wrote:
> > 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-encoding-video-file <https://superuser.com/questio >> ns/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#post2153378 >> <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 ;) so yeah, it seems '-f mpegts' is way to go. does sound appear if you replace -c:a pcm_s16be with pcm_s16le? > > =================== > > 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 > > > >
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