Hi Jerome, Thank you so much for this patch.
I ran a quick test and ffmpeg and ffplay seems to decode these files just fine. I noticed that taking a short 12-bit sequence (i didn't even realise that they were big endian actually) from the Blackmagic Cintel Scanner turned into FFV1 version 3 in Matroska with identical framemd5s. I did get some past duration errors in the terminal though: Here's a few frames that I used in this example. It seems to happen at the 16th frame.. https://www.dropbox.com/sh/imaasud6yora8me/AAAXXGIQ9w6fFfvx9qigizyVa?dl=0https://www.dropbox.com/sh/imaasud6yora8me/AAAXXGIQ9w6fFfvx9qigizyVa?dl=0 ./ffmpeg -start_number 00086400 -i first_frames/99075c82-2770-4020-a289-d191dab0b852_1_%08d.dpx -c:v ffv1 -level 3 out.mkv ffmpeg version N-89977-gddd851f Copyright (c) 2000-2018 the FFmpeg developers built with Apple LLVM version 8.0.0 (clang-800.0.42.1) configuration: libavutil 56. 7.100 / 56. 7.100 libavcodec 58. 10.100 / 58. 10.100 libavformat 58. 9.100 / 58. 9.100 libavdevice 58. 1.100 / 58. 1.100 libavfilter 7. 11.101 / 7. 11.101 libswscale 5. 0.101 / 5. 0.101 libswresample 3. 0.101 / 3. 0.101 Input #0, image2, from 'first_frames/99075c82-2770-4020-a289-d191dab0b852_1_%08d.dpx': Duration: 00:00:00.92, start: 0.000000, bitrate: N/A Stream #0:0: Video: dpx, gbrp12le, 2160x1702 [SAR 1:1 DAR 1080:851], 24 tbr, 25 tbn, 24 tbc Stream mapping: Stream #0:0 -> #0:0 (dpx (native) -> ffv1 (native)) Press [q] to stop, [?] for help [ffv1 @ 0x7fd89c013800] bits_per_raw_sample > 8, forcing range coder Output #0, matroska, to 'out.mkv': Metadata: encoder : Lavf58.9.100 Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), gbrp12le, 2160x1702 [SAR 1:1 DAR 1080:851], q=2-31, 200 kb/s, 24 fps, 1k tbn, 24 tbc Metadata: encoder : Lavc58.10.100 ffv1 frame= 2 fps=0.0 q=-0.0 size= 11653kB time=00:00:00.04 bitrate=2220121.7kbiframe= 4 fps=3.4 q=-0.0 size= 34930kB time=00:00:00.12 bitrate=2270993.5kbiframe= 6 fps=3.4 q=-0.0 size= 58259kB time=00:00:00.20 bitrate=2283544.4kbiframe= 8 fps=3.3 q=-0.0 size= 81588kB time=00:00:00.29 bitrate=2281121.4kbiframe= 10 fps=3.3 q=-0.0 size= 104852kB time=00:00:00.37bitrate=2284434.3kbiframe= 12 fps=3.3 q=-0.0 size= 128130kB time=00:00:00.45 bitrate=2286805.8kbiframe= 14 fps=3.3 q=-0.0 size= 151452kB time=00:00:00.54 bitrate=2284891.4kbiframe= 16 fps=3.3 q=-0.0 size= 174741kB time=00:00:00.62 bitrate=2286710.7kbiPast duration 0.639992 too large Past duration 0.679985 too large frame= 18 fps=3.2 q=-0.0 size= 198043kB time=00:00:00.70 bitrate=2288247.4kbiPast duration 0.719994 too large Past duration 0.759987 too large frame= 20 fps=3.2 q=-0.0 size= 221335kB time=00:00:00.79 bitrate=2286478.6kbiPast duration 0.799995 too large Past duration 0.839989 too large frame= 22 fps=3.2 q=-0.0 size= 244648kB time=00:00:00.87 bitrate=2287850.0kbiPast duration 0.879997 too large frame= 23 fps=3.1 q=-0.0 size= 256309kB time=00:00:00.91 bitrate=2287235.2kbiframe= 23 fps=3.1 q=-0.0 Lsize= 267948kB time=00:00:00.91 bitrate=2391103.3kbits/s speed=0.123x video:267947kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000610% Best, Kieran O'Leary IFI Irish Film Archive _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
