пт, 12 янв. 2024 г., 01:44 Terje J. Hanssen via Cin < cin@lists.cinelerra-gg.org>:
> I wanted to test AV1.webm rendering from anamorphic 16:9 SD-DV(D) > widescreen sources, which have different SAR 64:45 than 1080i HDV SAR 4:3 > > It would be fine to get this SAR value verified and clarified vs > Wikipedia's table which specifies different for PAL (16:9) 720x576 : SAR > 5:4, PAR 64:45 > > https://en.wikipedia.org/wiki/Pixel_aspect_ratio#Pixel_aspect_ratios_of_common_video_formats > > > This legacy 16:9 SD format was created and can be obtained among the > following methods:: > > 1. DV camcorders with Widescreen feature, the right/true way and > wrong/fake way > > https://www.videouniversity.com/articles/dv-formats-everything-you-need-to-know/#widescreen > 2. DV wide record or downconvert playback using a HD(V) camcorder with > this feature > 3. DVD video disc enhanced for 16:9 or a BD video disc with 16:9 SD > content > 4. Render/transcode i.e a HD(V) video file using > a) Cin-GG > b) FFmpeg > > > I have used the two latter methods as follows: > > 4 a) Cin-GG > Loaded a PAL 1080i/50 HDV clip > Set Format Preset: PAL 576i (16:9) - DV(D) > File Render File Format: FFmepg - avi (NB! because plain Raw DV still > causes DAR 4:3) > Audio: Preset: avi_pcm_s16.avi > Video: Compression: dv_pal.avi > > > ffprobe -hide_banner dv07_05_wide_cingg.avi > Input #0, avi, from 'dv07_05_wide_cingg.avi': > Metadata: > software : Lavf60.16.100 > Duration: 00:06:58.04, start: 0.000000, bitrate: 30342 kb/s > Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR > 64:45 DAR 16:9], 28802 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc > Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2 > channels, s16, 1536 kb/s > > > mediainfo dv07_05_wide_cingg.avi > General > Complete name : dv07_05_wide_cingg.avi > Format : AVI > Format/Info : Audio Video Interleave > Commercial name : DV > Format profile : OpenDML > Format settings : BitmapInfoHeader / PcmWaveformat > File size : 1.48 GiB > Duration : 6 min 58 s > Overall bit rate mode : Constant > Overall bit rate : 30.3 Mb/s > Frame rate : 25.000 FPS > Writing application : Lavf60.16.100 > > Video > ID : 0 > Format : DV > Codec ID : dvsd > Codec ID/Hint : Sony > Duration : 6 min 58 s > Bit rate mode : Constant > Bit rate : 24.4 Mb/s > Width : 720 pixels > Height : 576 pixels > Display aspect ratio : 16:9 > Frame rate mode : Constant > Frame rate : 25.000 FPS > Standard : PAL > Color space : YUV > Chroma subsampling : 4:2:0 > Bit depth : 8 bits > Scan type : Interlaced > Scan order : Bottom Field First > Compression mode : Lossy > Bits/(Pixel*Frame) : 2.357 > Stream size : 1.40 GiB (95%) > > Audio > ID : 1 > Format : PCM > Format settings : Little / Signed > Codec ID : 1 > Duration : 6 min 58 s > Bit rate mode : Constant > Bit rate : 1 536 kb/s > Channel(s) : 2 channels > Sampling rate : 48.0 kHz > Bit depth : 16 bits > Stream size : 76.6 MiB (5%) > Alignment : Aligned on interleaves > Interleave, duration : 208 ms (5.21 video frames) > > > 4 b) FFmpeg transcode HDV to DV-wide > > > ffmpeg -hide_banner -i hdv07_05.m2t -vf > scale=720:576,setsar=64/45,setdar=16/9 -c:v dvvideo -c:a pcm_s16le > dv07_05_wide.dv > Stream mapping: > Stream #0:0 -> #0:0 (mpeg2video (native) -> dvvideo (native)) > Stream #0:1 -> #0:1 (mp2 (native) -> pcm_s16le (native)) > Stream #0:0: Video: dvvideo, yuv420p(tv, bt709, top coded first > (swapped)), 720x576 [SAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn > Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > frame=10457 fps=356 q=-0.0 Lsize= 1440422kB time=00:06:58.28 > bitrate=28210.6kbits/s dup=217 drop=0 speed=14.3x > > > ffprobe -hide_banner dv07_05_wide.dv > [dv @ 0x56036476e580] Estimating duration from bitrate, this may be > inaccurate > Input #0, dv, from 'dv07_05_wide.dv': > Metadata: > timecode : 00:00:00:00 > Duration: 00:06:49.72, start: 0.000000, bitrate: 28800 kb/s > Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 64:45 DAR 16:9], > 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc > Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > > > mediainfo dv07_05_wide.dv > General > Complete name : dv07_05_wide.dv > Format : DV > Commercial name : DVCAM > File size : 1.37 GiB > Duration : 6 min 49 s > Overall bit rate mode : Constant > Overall bit rate : 28.8 Mb/s > Frame rate : 25.000 FPS > Recorded date : 1970-01-01 00:00:00.000 > > Video > Format : DV > Commercial name : DVCAM > Duration : 6 min 49 s > Bit rate mode : Constant > Bit rate : 24.4 Mb/s > Width : 720 pixels > Height : 576 pixels > Display aspect ratio : 16:9 > Frame rate mode : Constant > Frame rate : 25.000 FPS > Standard : PAL > Color space : YUV > Chroma subsampling : 4:2:0 > Bit depth : 8 bits > Scan type : Interlaced > Scan order : Top Field First > Compression mode : Lossy > Bits/(Pixel*Frame) : 2.357 > Time code of first frame : 00:00:00:00 > Time code source : Subcode time code > Stream size : 1.17 GiB (85%) > > Audio > ID : 0 > Format : PCM > Format settings : Big / Signed > Duration : 6 min 49 s > Bit rate mode : Constant > Bit rate : 1 536 kb/s > Channel(s) : 2 channels > Sampling rate : 48.0 kHz > Bit depth : 16 bits > Stream size : 75.0 MiB (5%) > > --------------------------------- > > The HDV source has Scan order : Top Field First > What would be right, Top or Bottom Field First for the output file (they > differ)? > If I read this random Avid-related post correctly - bottom? https://community.avid.com/forums/p/55996/312955.aspx from memory if you step around wrongly fielded file you get some jarring line motions different from usual interlace-on-progressive line artefacts .... > Rendering next the AVI and DV files to AV1.webm displays correct 16:9 > widescreen > > > -- > Cin mailing list > Cin@lists.cinelerra-gg.org > https://lists.cinelerra-gg.org/mailman/listinfo/cin >
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