VOB/MPEG2 restoring workflow
Hi,
what's the best choice for restoring a MPEG2 file (VOB demuxed from a DVD)?
MPEG2 to H.264 ?
MPEG2 to DNxHR?
MPEG2 to Prores?
MPEG2 to DV25?
MPEG2 to TIFF?
Can we use a proxy video file?
Thanks!
PS
goal: good stability of application during editing
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I think this is perfect for now:
ffmpeg -i input.avi -map 0:0 -c:v dnxhd -vf "pad=960:720:(ow-iw)/2:(oh-ih)/2,fps=25,format=yuv422p" -b:v 42M output_for_phoenix.movSource file is:
Codec ID : DX50 Codec ID/Hint : DivX 5 Duration : 1 h 26 min Bit rate : 1 236 kb/s Nominal bit rate : 7 800 kb/s Width : 608 pixels Height : 464 pixels Display aspect ratio : 4:3 Frame rate : 29.970 (30000/1001) FPSresult (perfect for dnxhd size compatibility):
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Mario Rossi Ideally you want to convert to an intraframe codec, so it's easier to process and will yield better results. DNX and Prores family are the most commonly used.
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Gustavo Mendes maybe we can use this way:
ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -i "input.m2ts" -map 0:0 -c:v h264_nvenc -preset lossless -forced-idr 1 -f mp4 "output.mp4"- intraframe --> -forced-idr 1 (info about IDF here)
- fast encoding --> via CUDA (I have a RTX 4070 Ti 12GB / i9-14900k 32GB)
- efficent space --> For a 10m 53s film (720x480p@23.976fps - 651MB):
- "visually lossless" --> Apple ProRes 4444 XQ --> 5.2GB
- "true lossless" --> h264_nvenc (lossless, force-idr) --> 1.8GB
What is your opinion?
Thanks!
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Mario Rossi I still would not recommend an h.264 file intraframe. As you can see by the size difference, there's still compression happening going to an MPEG-4 codec. It's not commonly used in the industry and you can run into issues playing it back on some systems. Prores, DNX and even FFv1 will have better compatibility.
Now, if it works for your specific workflow, for it! I have not tested an intraframe transport in Phoenix, so your mileage may vary.
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Not so bad FFV1 :)
ffmpeg -hide_banner -i "input.m2ts" -map 0:0 -c:v ffv1 -level 3 "output_ffv1_level-v3.mxf"produces a lossless 1.9GB file.:
General Complete name : ouput.mxf Format : MXF Format version : 1.3 Format profile : OP-1a Format settings : Closed / Complete File size : 1.81 GiB Duration : 10 min 53 s Overall bit rate mode : Variable Overall bit rate : 23.8 Mb/s Frame rate : 29.970 FPS Encoded date : 0-00-00 00:00:00.000 Writing application : FFmpeg OP1a Muxer 61.7.100.0.0 Writing library : Lavf (mingw32) 61.7.100.0.0 Video ID : 2 Format : FFV1 Format version : Version 3.4 Format settings, wrapping mode : Frame Format settings, Slice count : 4 slices per frame Codec ID : 0D01030102230100-0401020203090400 Duration : 10 min 53 s Bit rate mode : Variable Bit rate : 23.8 Mb/s Width : 720 pixels Height : 480 pixels Display aspect ratio : 4:3 Frame rate : 29.970 (30000/1001) FPS Standard : NTSC Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Compression mode : Lossless Bits/(Pixel*Frame) : 2.294 Stream size : 1.81 GiB (100%) Color range : Limited Color primaries : BT.601 NTSC Transfer characteristics : BT.709 Matrix coefficients : BT.601 coder_type : Golomb Rice ErrorDetectionType : Per slice Other #1 ID : 1-Material Type : Time code Format : MXF TC Frame rate : 29.970 (30000/1001) FPS Time code of first frame : 00:00:00:00 Time code of last frame : 00:10:53:02 Time code settings : Material Package Time code, stripped : Yes Other #2 ID : 1-Source Type : Time code Format : MXF TC Frame rate : 29.970 (30000/1001) FPS Time code of first frame : 00:00:00:00 Time code of last frame : 00:10:53:02 Time code settings : Source Package Time code, stripped : Yes Other #3 Type : Time code Format : SMPTE TC Muxing mode : SDTI Frame rate : 29.970 (30000/1001) FPS Time code of first frame : 00:00:00:00I'll try FFV1 and h264 testing stability..
Anyway, FFV1 pros = small output size, cons = no GPU enconding :(
Gustavo is FFV1 only for write or also for read? (https://forum.filmworkz.com/t/83yq2c3/supported-formats)
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