n/a
| film/video | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| description | 8mm, positive, b/w | 8mm, positiv, b/w | 16mm, positive, b/w | 35mm, combined, color | 35mm, combined, color |
| width | 2500 | 2500 | 2048 | 4096 | 4096 |
| height | 1524 | 1524 | 1520 | 3460 | 2976 |
| bits per pixel | 48 | 48 | 48 | 48 | 48 |
| pxfmt | gbrp16le | gbrp16le | gbrp16le | gbrp16le | gbrp16le |
| duration in s | 12 | 12 | 11,459 | 2,5 | 2,5 |
| fps | 24 | 24 | 24 | 24 | 24 |
| frames | 288 | 288 | 275 | 60 | 60 |
| original size | 6583680000 | 6583680000 | 5136682844,16 | 5101977600 | 4388290560 |
| compressed size | 3861943880 | 3790690517 | 3680779719 | 3908475344 | 3576745774 |
| compression ratio | 1,704 | 1,736 | 1,395 | 1,305 | 1,226 |
| (DPX size) | 6584159232 | 6584159232 | 5136841600 | 5102077440 | 4388390400 |
| (h264 lossless) | n/a | n/a | n/a | n/a | n/a |
| (h265 lossless) | 3573420309 | 3559442475 | 2756504247 | 3015053822 | 2992764833 |
| (jp2k lossless) | 4589886341 | 4534014321 | 3732555539 | 3869665916 | 3514687046 |
| with audio | n | n | n | y | n |
n/a
| film/video | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|
| description | 35mm, combined, color | vhs, color | betacam, color | betacam, color | Digi-beta, color |
| width | 4096 | 720 | 720 | 720 | 720 |
| height | 3200 | 576 | 576 | 576 | 576 |
| bits per pixel | 48 | 20 | 20 | 20 | 20 |
| pxfmt | gbrp16le | yuv422p10le | yuv422p10le | yuv422p10le | yuv422p10le |
| duration in s | 1088,042 | 280 | 280 | 280 | 280 |
| fps | 24 | 25 | 25 | 25 | 25 |
| frames | 26113 | 7000 | 7000 | 7000 | 7000 |
| original size | 2053610510746 | 7257600000 | 7257600000 | 7257600000 | 7257600000 |
| compressed size | 1575415175611 | 3565437155 | 3838500934 | 3449372280 | 4451325952 |
| compression ratio | 1,303 | 2,035 | 1,890 | 2,104 | 1,630 |
| (DPX size) | 2053653333632 | 17472217728 | 17429888000 | 17429888000 | 17429888000 |
| (h264 lossless) | n/a | n/a | n/a | n/a | n/a |
| (h265 lossless) | 1248031292634 | 3659828688 | 3772522257 | 3442739259 | 4323623225 |
| (jp2k lossless) | 1517117560575 | 3300899483 | 3470434177 | 3150727081 | 4022908822 |
| with audio | n | y | y | y | y |
All files are encoded with FFV1v3 with slices, slice-crc, GOP=1. If audio exists, it is (lin. PCM 48kHz, 16bit) included in compression-size, but not in original size, because original size is calculated by width*height*pits_per_pixel*frames and compression-size is equivalent to filesize. The count of frames is calculated with the duration value of the MKV-files. The files 1 to 5, and 7-10 are first parts of the movies (each 4GB splits).
Hint: Once the project is completed, rights must be clarified. If possible, I will publish the sources.
Update 2017-06-09
- added file size for DPX after using "ffmpeg -i input.mkv DPX/frame_%06d.dpx"
- added file size for h264 after using "ffmpeg -i input.mkv -c:v libx264 -g 1 -qp 0 -crf 0 output.mkv" (RGB without lossy conversion to YUV not supported yet)
- added file size for h265 after using "ffmpeg -i input.mkv -c:v libx265 -preset veryslow -x265-params lossless=1 output.mkv"
- added file size for openjpeg2000 after using "ffmpeg -i input.mkv -c:v libopenjpeg output.mkv"
- added sizes for film no 6
- in general, the processing time of h265 and jp2k is one magnitude greater than for ffv1
Interpretation
The files 1-3 are all originally b/w. It seems to be that the codec does not decorrelate the color channels. Also the material 1-6 is retrodigitized from film and are noisy. The file 1 is very special. In decoding the FFV1 produces a very high load on the CPU (eight cores at 100%). The most decoding time is spent in method get_rac(). The original film has the highest noise level in contrast to the other files.
I think the compression-ratio difference between video- and film files comes from the different pixel format. A ratio between 1,5 - 2 was expected, but 1,3 is a surprise.
Update 2017-06-09
The reason for high CPU load was, that the digitization service provider has created a file with a framerate of 1000 fps, but the scanner has provided 24 or 25 fps. Therefore 42-40 equal frames was encoded on block.
