вс, 28 июн. 2026 г., 16:03 Andrew Randrianasulu <randrianasulu@gmail.com>:

вс, 28 июн. 2026 г., 15:40 Andrew Randrianasulu <randrianasulu@gmail.com>:

...

As Andrea noted

ffv1.mkv preset no longer works, file encodes but crash cingg on reimport.

ffmpeg itself behaves .. strange

ffmpeg -i zeldaHQ.flv -c:v ffv1 -default_mode 0 -frames 100 mkv_tedt.mkv -loglevel debug

only muxes 3 frames?

ah, this one was due to misuse of frames, now it must be

-frames:v

but ffv1 mov also failed, as well as ffmpeg (cli) encoded ffv1 mkv

but adding

coder=ac range_mode=off qtable=8bit

allowed encoded file to import. slowly (160*120! slow!)

ah, it was vulkan over lavapipe that was slow and crashy! setting hw accel to none fixed that SPIR-V WARNING: In file ../src/src/compiler/spirv/vtn_cfg.c:147 Function parameter Decoration not handled: SpvDecorationNonWritable 57132 bytes into the SPIR-V binary this was clue about vulkan/lavapipe use, I forgot about At least now it works,as in renders in ffv1_user.mkv and reimports fine.

...

[matroska @ 0xb400007a8916a870] stream 1 end duration = 336

[AVIOContext @ 0xb400007a59164790] Statistics: 33361 bytes written, 0 seeks, 1 writeouts [out#0/matroska @ 0xb400007a39163010] Output file #0 (mkv_tedt.mkv): [out#0/matroska @ 0xb400007a39163010] Output stream #0:0 (video): 3 frames encoded; 3 packets muxed (27141 bytes);

[out#0/matroska @ 0xb400007a39163010] Output stream #0:1 (audio): 112 frames encoded (7147 samples); 19 packets muxed (1905 bytes);

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but same command with -an (no audio) muxes all 100 frames ?!

vp8/vp9/theora mkv profiles seems to be unaffected