IMF demuxer support

[dprestegard]

Would anyone be interested in SMPTE ST 2067 (IMF) support? This is a very popular format in the major studio world for finished program mastering and interchange.

[kasper93]

sample? This should already be supported.

[dprestegard]

None of my IMF samples open (all of which work in FFmpeg). I can repro this with the open content Sol Levante from Netflix
https://opencontent.netflix.com/

When I run with --msg-level=all=trace It looks like it almost works, but then never opens an output window:

mpv .\CPL_0a207596-a0f5-458a-811e-a97a4286d00c.xml --msg-level=all=trace

...
[ffmpeg/demuxer] imf: Processing IMF CPL Segment
[ffmpeg/demuxer] imf: Processing IMF CPL Main Image Sequence for Virtual Track f66420fb-5235-4965-809d-53d22c610564
[ffmpeg/demuxer] imf: Processing IMF CPL Audio Sequence for Virtual Track 09f451a7-931c-444e-8925-007e475d8d20
[ffmpeg/demuxer] imf: Processing IMF CPL Audio Sequence for Virtual Track 2d22f6b0-b62d-4537-aef2-6651c2ba0968
[ffmpeg/demuxer] imf: IMF CPL ContentTitle: SolLevante_UHD_P3PQ_01
[ffmpeg/demuxer] imf: IMF CPL Id: 0a207596-a0f5-458a-811e-a97a4286d00c
[ffmpeg/demuxer] imf: Setting timecode to IMF CPL timecode 00:00:00:00
[ffmpeg/demuxer] imf: parsed IMF CPL: urn:uuid:0a207596-a0f5-458a-811e-a97a4286d00c
[ffmpeg/demuxer] imf: No asset maps provided, using the default ASSETMAP.xml
[ffmpeg/demuxer] imf: start parsing IMF Asset Map: ./ASSETMAP.xml
[ffmpeg/demuxer] imf: Asset Map URL: ./ASSETMAP.xml
[ffmpeg/demuxer] imf: Opening './ASSETMAP.xml' for reading
[ffmpeg] file: Setting default whitelist 'file,crypto,data'
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:e4da5fcd-5ffc-4713-bcdd-95ea579d790b
[ffmpeg/demuxer] imf: Found asset absolute URI: ./VIDEO_e4da5fcd-5ffc-4713-bcdd-95ea579d790b.mxf
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:c2d618d0-b775-47c2-ac45-8eccb9afc40a
[ffmpeg/demuxer] imf: Found asset absolute URI: ./AUDIO_c2d618d0-b775-47c2-ac45-8eccb9afc40a.mxf
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:4467fc2f-2536-44ba-b1f9-010e0ae3f6b1
[ffmpeg/demuxer] imf: Found asset absolute URI: ./AUDIO_4467fc2f-2536-44ba-b1f9-010e0ae3f6b1.mxf
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:0a207596-a0f5-458a-811e-a97a4286d00c
[ffmpeg/demuxer] imf: Found asset absolute URI: ./CPL_0a207596-a0f5-458a-811e-a97a4286d00c.xml
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:0a39a10c-d1da-4e53-b32c-1ceab7d94cf0
[ffmpeg/demuxer] imf: Found asset absolute URI: ./OPL_0a39a10c-d1da-4e53-b32c-1ceab7d94cf0.xml
[ffmpeg/demuxer] imf: Found asset id: urn:uuid:51e5f3c5-44b3-4001-9c90-9a19087982d3
[ffmpeg/demuxer] imf: Found asset absolute URI: ./PKL_51e5f3c5-44b3-4001-9c90-9a19087982d3.xml
[ffmpeg/demuxer] imf: Found 6 assets from ./ASSETMAP.xml
[ffmpeg] AVIOContext: Statistics: 2439 bytes read, 0 seeks
[ffmpeg/demuxer] imf: parsed IMF Asset Maps
[ffmpeg/demuxer] imf: Open stream from file urn:uuid:e4da5fcd-5ffc-4713-bcdd-95ea579d790b, stream 0
[ffmpeg/demuxer] imf: Found locator for urn:uuid:e4da5fcd-5ffc-4713-bcdd-95ea579d790b: ./VIDEO_e4da5fcd-5ffc-4713-bcdd-95ea579d790b.mxf
[ffmpeg/demuxer] imf: Open stream from file urn:uuid:c2d618d0-b775-47c2-ac45-8eccb9afc40a, stream 0
[ffmpeg/demuxer] imf: Found locator for urn:uuid:c2d618d0-b775-47c2-ac45-8eccb9afc40a: ./AUDIO_c2d618d0-b775-47c2-ac45-8eccb9afc40a.mxf
[ffmpeg/demuxer] imf: Open stream from file urn:uuid:4467fc2f-2536-44ba-b1f9-010e0ae3f6b1, stream 0
[ffmpeg/demuxer] imf: Found locator for urn:uuid:4467fc2f-2536-44ba-b1f9-010e0ae3f6b1: ./AUDIO_4467fc2f-2536-44ba-b1f9-010e0ae3f6b1.mxf

[kasper93]

There are small bugs in ffmpeg custom io callbacks, that prevent mpv from working with nested avio contexts. Will be fixed by https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=14534

[kasper93]

Both patches has been merged, everything should work fine now (with master version of ffmpeg and next stable). Let me know if there are remaining issues.

[dprestegard]

Awesome, thanks!!