online .avi files take too long to start playing

Important Information

Provide following Information:

• mpv version
  mpv 0.36.0

• Platform and Version
  Windows 11

• Source of the mpv binary
  mpv-0.36.0-x86_64

https://github.com/mpv-player/mpv/releases/tag/v0.36.0

Reproduction steps

I have a simple local file server and uploaded a shorter example avi file. bigsample.avi size is 2GB

mpv -v --no-config http://127.0.0.1/bigsample.avi
or
mpv -v --no-config http://127.0.0.1/sample.avi

with uploaded file sample
mpv -v --no-config https://0x0.st/HO0Z.avi

Expected behavior

play files .avi online as soon as there is data to play and the time finder works to be able to jump to a certain minute

Actual behavior

It takes too long to start playing large files as it takes a while to search for a certain section of video information using '[ffmpeg] stream level seek from x to y'.

If I use --stream-lavf-o=seekable=0 it starts playing as soon as there is data but it is not possible to use the time seek bar, if I use --force-seekable=yes it only searches the previously played data.

I try from vlc and this problem does not seem to occur.

If the 0x0.st test file is used, the waiting time may be a little shorter due to its small size, however there is a few seconds of delay.

Log file

bigsample.avi

[cplayer] Command line options: '-v' '--no-config' 'http://127.0.0.1/bigsample.avi'
[cplayer] mpv 0.36.0 Copyright © 2000-2023 mpv/MPlayer/mplayer2 projects
[cplayer] built on Tue Aug 01 10:56:31 2023
[cplayer] libplacebo version: v6.292.0-78-gabf34ba-dirty
[cplayer] FFmpeg version: N-111661-g567e78b28
[cplayer] FFmpeg library versions:
[cplayer] libavutil 58.14.100
[cplayer] libavcodec 60.22.100
[cplayer] libavformat 60.10.100
[cplayer] libswscale 7.3.100
[cplayer] libavfilter 9.10.100
[cplayer] libswresample 4.11.100
[cplayer]
[cplayer] Configuration: -Db_lto=true -Db_ndebug=true -Dlibmpv=true -Dpdf-build=enabled -Dlua=enabled -Djavascript=enabled -Dsdl2=enabled -Dlibarchive=enabled -Dlibbluray=enabled -Ddvdnav=enabled -Duchardet=enabled -Drubberband=enabled -Dlcms2=enabled -Dopenal=enabled -Dspirv-cross=enabled -Dvulkan=enabled -Dlibplacebo=enabled -Dvapoursynth=enabled -Degl-angle=enabled -Dprefix=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build64/install/mingw -Dlibdir=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build64/install/mingw/lib -Dbuildtype=release -Ddefault_library=shared -Dprefer_static=True --cross-file=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build64/meson_cross.txt
[cplayer] List of enabled features: av-channel-layout avif_muxer build-date cuda-hwaccel cuda-interop d3d-hwaccel d3d11 d3d9-hwaccel direct3d dos-paths dvdnav egl-angle egl-angle-win32 egl-helpers ffmpeg ffnvcodec gl gl-dxinterop gl-dxinterop-d3d9 gl-win32 glob glob-win32 gpl iconv javascript jpeg jpegxl lcms2 libarchive libass libavdevice libbluray libm libplacebo libplacebo-next luajit manpage-build noexecstack openal pdf-build rubberband rubberband-3 sdl2 sdl2-audio sdl2-gamepad sdl2-video shaderc spirv-cross stdatomic threads uchardet vapoursynth vector vk_khr_display vulkan vulkan-interop wasapi win32 win32-desktop win32-executable win32-internal-pthreads zimg zimg-st428 zlib
[cplayer] Built with NDEBUG.
[cplayer] Setting option 'v' = '' (flags = 8)
[cplayer] Setting option 'config' = 'no' (flags = 8)
[cplayer] Waiting for scripts...
[osd/libass] libass API version: 0x1701000
[osd/libass] libass source: commit: 0.17.0-51-g91422bdb9497e8484b3248f5ae7eb50d41e2555d
[osd/libass] Shaper: FriBidi 1.0.13 (SIMPLE) HarfBuzz-ng 8.1.0 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider directwrite (with GDI)
[osd/libass] Done.
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/visibility="auto" -> 1
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[cplayer] Done loading scripts.
[cplayer] Running hook: ytdl_hook/on_load
[ytdl_hook] ytdl:// hook
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[ytdl_hook] not a ytdl:// url
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[osd/libass] libass API version: 0x1701000
[osd/libass] libass source: commit: 0.17.0-51-g91422bdb9497e8484b3248f5ae7eb50d41e2555d
[ffmpeg] Opening http://127.0.0.1/bigsample.avi
[osd/libass] Shaper: FriBidi 1.0.13 (SIMPLE) HarfBuzz-ng 8.1.0 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider directwrite (with GDI)
[osd/libass] Done.
[ffmpeg] Could not set AVOption tls_verify='0'
[ffmpeg] Mime-type: 'video/x-msvideo'
[demux] Trying demuxers for level=normal.
[lavf] Found 'avi' at score=100 size=2048.
[ffmpeg] stream level seek from 7843 to 3086393736
[ffmpeg] stream level seek from 3086434341 to 260
[ffmpeg] stream level seek from 8101 to 3086418344
[ffmpeg] stream level seek from 3086458949 to 276
[ffmpeg] stream level seek from 8117 to 3086442952
[ffmpeg] stream level seek from 3086483557 to 292
[ffmpeg] stream level seek from 8133 to 3086467560
[ffmpeg] stream level seek from 3086508165 to 308
[ffmpeg] stream level seek from 8149 to 3086492168
[ffmpeg] stream level seek from 3086532773 to 324
[ffmpeg] stream level seek from 8165 to 3086516776
[ffmpeg] stream level seek from 3086557381 to 340
[ffmpeg] stream level seek from 8181 to 3086541384
[ffmpeg] stream level seek from 3086581989 to 356
[ffmpeg] stream level seek from 8197 to 3086565992
[ffmpeg] stream level seek from 3086606597 to 372
[ffmpeg] stream level seek from 8213 to 3086590600
[ffmpeg] stream level seek from 3086631205 to 388
[ffmpeg] stream level seek from 8229 to 3086615208
[ffmpeg] stream level seek from 3086655813 to 404
[ffmpeg] stream level seek from 8245 to 3086639816
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[ffmpeg] stream level seek from 8261 to 3086664424
[ffmpeg] stream level seek from 3086705029 to 436
[ffmpeg] stream level seek from 8277 to 3086689032
[ffmpeg] stream level seek from 3086729637 to 452
[ffmpeg] stream level seek from 8293 to 3086713640
[ffmpeg] stream level seek from 3086754245 to 468
[ffmpeg] stream level seek from 8309 to 3086738248
[ffmpeg] stream level seek from 3086778853 to 484
[ffmpeg] stream level seek from 8325 to 3086762856
[ffmpeg] stream level seek from 3086803461 to 500
[ffmpeg] stream level seek from 8341 to 3086787464
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[ffmpeg] stream level seek from 3086877285 to 548
[ffmpeg] stream level seek from 8389 to 3086861288
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[ffmpeg] stream level seek from 8421 to 3086910504
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[ffmpeg] stream level seek from 3087000325 to 628
[ffmpeg] stream level seek from 8469 to 3086984328
[ffmpeg] stream level seek from 3087024933 to 644
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[ffmpeg] stream level seek from 3087049541 to 660
[ffmpeg] stream level seek from 8501 to 3087033544
[ffmpeg] stream level seek from 3087074149 to 676
[ffmpeg] stream level seek from 8517 to 3087058152
[ffmpeg] stream level seek from 3087098757 to 692
[ffmpeg] stream level seek from 8533 to 3087082760
[ffmpeg] stream level seek from 3087123365 to 708
[ffmpeg] stream level seek from 8549 to 3087107368
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[ffmpeg] stream level seek from 8581 to 3087156584
[ffmpeg] stream level seek from 3087197189 to 756
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[ffmpeg] stream level seek from 8629 to 3087230408
[ffmpeg] stream level seek from 3087271013 to 804
[ffmpeg] stream level seek from 8645 to 3087255016
[ffmpeg] stream level seek from 3087295621 to 820
[ffmpeg] stream level seek from 8661 to 3087279624
[ffmpeg] stream level seek from 3087320229 to 836
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[ffmpeg] stream level seek from 8709 to 3087353448
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[ffmpeg] stream level seek from 3087418661 to 900
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[ffmpeg] stream level seek from 3087812389 to 1156
[ffmpeg] stream level seek from 8996 to 3087796392
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[ffmpeg] stream level seek from 9012 to 3087821000
[ffmpeg] stream level seek from 3087861605 to 1188
[ffmpeg] stream level seek from 9028 to 3087845608
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[ffmpeg] stream level seek from 3087910821 to 1220
[ffmpeg] stream level seek from 9060 to 3087894824
[ffmpeg] stream level seek from 3087935429 to 1236
[ffmpeg] stream level seek from 9076 to 3087919432
[ffmpeg] stream level seek from 3087960037 to 1252
[ffmpeg] stream level seek from 9092 to 3087944040
[ffmpeg] stream level seek from 3087984645 to 1268
[ffmpeg] stream level seek from 9108 to 3087968648
[ffmpeg] stream level seek from 3088009253 to 1284
[ffmpeg] stream level seek from 9124 to 3087993256
[ffmpeg] stream level seek from 3088033861 to 1300
[ffmpeg] stream level seek from 9140 to 3088017864
[ffmpeg] stream level seek from 3088058469 to 1316
[ffmpeg] stream level seek from 9156 to 3088042472
[ffmpeg] stream level seek from 3088083077 to 1332
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[ffmpeg] stream level seek from 3088107685 to 1348
[ffmpeg] stream level seek from 9188 to 3088091688
[ffmpeg] stream level seek from 3088132293 to 1364
[ffmpeg] stream level seek from 9204 to 3088116296
[ffmpeg] stream level seek from 3088156901 to 1380
[ffmpeg] stream level seek from 9220 to 3088140904
[ffmpeg] stream level seek from 3088181509 to 1396
[ffmpeg] stream level seek from 9236 to 3088165512
[ffmpeg] stream level seek from 3088206117 to 1412
[ffmpeg] stream level seek from 9252 to 3088190120
[ffmpeg] stream level seek from 3088230725 to 1428
[ffmpeg] stream level seek from 9268 to 3088214728
[ffmpeg] stream level seek from 3088255333 to 1444
[ffmpeg] stream level seek from 9284 to 3088239336
[ffmpeg] stream level seek from 3088279941 to 1460
[ffmpeg] stream level seek from 9300 to 3088263944
[ffmpeg] stream level seek from 3088304549 to 1476
[ffmpeg] stream level seek from 9316 to 3088288552
[ffmpeg] stream level seek from 3088329157 to 1492
[ffmpeg] stream level seek from 9332 to 3088313160
[ffmpeg] stream level seek from 3088353765 to 1508
[ffmpeg] stream level seek from 9348 to 3088337768
[ffmpeg] stream level seek from 3088378373 to 1524
[ffmpeg] stream level seek from 9364 to 3088362376
[ffmpeg] stream level seek from 3088402981 to 1540
[ffmpeg] stream level seek from 9380 to 3088386984
[ffmpeg] stream level seek from 3088427589 to 1556
[ffmpeg] stream level seek from 9396 to 3088411592
[ffmpeg] stream level seek from 3088452197 to 1572
[ffmpeg] stream level seek from 9412 to 3088435160
[ffmpeg] stream level seek from 3088475765 to 4490
[ffmpeg] stream level seek from 12330 to 3088459768
[ffmpeg] stream level seek from 3088500373 to 4506
[ffmpeg] stream level seek from 12346 to 3088484376
[ffmpeg] stream level seek from 3088524981 to 4522
[ffmpeg] stream level seek from 12362 to 3088508984
[ffmpeg] stream level seek from 3088549589 to 4538
[ffmpeg] stream level seek from 12378 to 3088533592
[ffmpeg] stream level seek from 3088574197 to 4554
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[ffmpeg] stream level seek from 3088598805 to 4570
[ffmpeg] stream level seek from 12410 to 3088582808
[ffmpeg] stream level seek from 3088623413 to 4586
[ffmpeg] stream level seek from 12426 to 3088607416
[ffmpeg] stream level seek from 3088648021 to 4602
[ffmpeg] stream level seek from 12442 to 3088632024
[ffmpeg] stream level seek from 3088672629 to 4618
[ffmpeg] stream level seek from 12458 to 3088656632
[ffmpeg] stream level seek from 3088697237 to 4634
[ffmpeg] stream level seek from 12474 to 3088681240
[ffmpeg] stream level seek from 3088721845 to 4650
[ffmpeg] stream level seek from 12490 to 3088705848
[ffmpeg] stream level seek from 3088746453 to 4666
[ffmpeg] stream level seek from 12506 to 3088730456
[ffmpeg] stream level seek from 3088771061 to 4682
[ffmpeg] stream level seek from 12522 to 3088755064
[ffmpeg] stream level seek from 3088795669 to 4698
[ffmpeg] stream level seek from 12538 to 3088779672
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[ffmpeg] stream level seek from 3088844885 to 4730
[ffmpeg] stream level seek from 12570 to 3088828888
[ffmpeg] stream level seek from 3088869493 to 4746
[ffmpeg] stream level seek from 12586 to 3088853496
[ffmpeg] stream level seek from 3088894101 to 4762
[ffmpeg] stream level seek from 12602 to 3088878104
[ffmpeg] stream level seek from 3088918709 to 4778
[ffmpeg] stream level seek from 12618 to 3088902712
[ffmpeg] stream level seek from 3088943317 to 4794
[ffmpeg] stream level seek from 12634 to 3088927320
[ffmpeg] stream level seek from 3088967925 to 4810
[ffmpeg] stream level seek from 12650 to 3088951928
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[ffmpeg] stream level seek from 12666 to 3088976536
[ffmpeg] stream level seek from 3089017141 to 4842
[ffmpeg] stream level seek from 12682 to 3089001144
[ffmpeg] stream level seek from 3089041749 to 4858
[ffmpeg] stream level seek from 12698 to 3089025752
[ffmpeg] stream level seek from 3089066357 to 4874
[ffmpeg] stream level seek from 12714 to 3089050360
[ffmpeg] stream level seek from 3089090965 to 4890
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[ffmpeg] stream level seek from 3089115573 to 4906
[ffmpeg] stream level seek from 12746 to 3089099576
[ffmpeg] stream level seek from 3089140181 to 4922
[ffmpeg] stream level seek from 12762 to 3089124184
[ffmpeg] stream level seek from 3089164789 to 4938
[ffmpeg] stream level seek from 12778 to 3089148792
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[ffmpeg] stream level seek from 12794 to 3089173400
[ffmpeg] stream level seek from 3089214005 to 4970
[ffmpeg] stream level seek from 12810 to 3089198008
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[ffmpeg] stream level seek from 46410 to 0
[lavf] avformat_find_stream_info() finished after 73379 bytes.
[demux] Detected file format: avi (libavformat)
[cplayer] Opening done: http://127.0.0.1/bigsample.avi
[cplayer] Running hook: ytdl_hook/on_preloaded
[lavf] select track 0
[lavf] select track 1
[cplayer] (+) Video --vid=1 (mpeg4 720x400 23.976fps)
[cplayer] (+) Audio --aid=1 (ac3 6ch 48000Hz)
[vo/gpu] Probing for best GPU context.
[vo/gpu/d3d11] Initializing GPU context 'd3d11'
[vo/gpu/d3d11] Using Direct3D 11 feature level 12_1
[vo/gpu/d3d11] Device Name: Intel(R) HD Graphics 530
[vo/gpu/d3d11] Device ID: 8086:1912 (rev 06)
[vo/gpu/d3d11] Subsystem ID: 1043:8694
[vo/gpu/d3d11] LUID: 00000000000105c5
[vo/gpu/d3d11] Initializing SPIR-V compiler 'shaderc'
[vo/gpu/d3d11] Using Direct3D 11.1 runtime
[vo/gpu/d3d11] Maximum Texture2D size: 16384x16384
[vo/gpu/d3d11] D3DCompiler version: 10.0.22000.653
[vo/gpu/d3d11] Using DXGI 1.2+
[vo/gpu/d3d11] Queried output: \.\DISPLAY1, 1600x900 @ 8 bits, colorspace: RGB_FULL_G22_NONE_P709 (0)
[vo/gpu/d3d11] Selected swapchain format R8G8B8A8_UNORM (28), attempting to utilize it.
[vo/gpu/d3d11] Selected swapchain color space RGB_FULL_G22_NONE_P709 (0), attempting to utilize it.
[vo/gpu/d3d11] Swapchain capabilities for color space RGB_FULL_G22_NONE_P709 (0): normal: yes, overlay: yes
[vo/gpu/d3d11] Swapchain successfully configured to color space RGB_FULL_G22_NONE_P709 (0)!
[vo/gpu/d3d11] Using flip-model presentation
[vo/gpu] Testing FBO format rgba16hf
[vo/gpu] Using FBO format rgba16hf.
[vo/gpu] No advanced processing required. Enabling dumb mode.
[vo/gpu/win32] DPI detected from the new API: 96
[vo/gpu/win32] display-fps: 60.000000
[vo/gpu/win32] color-profile: C:\WINDOWS\system32\spool\drivers\color\sRGB Color Space Profile.icm
[vo/gpu] Assuming 60.000000 FPS for display sync.
[vd] Container reported FPS: 23.976043
[vd] Codec list:
[vd] mpeg4 - MPEG-4 part 2
[vd] mpeg4_cuvid (mpeg4) - Nvidia CUVID MPEG4 decoder
[vd] Opening decoder mpeg4
[vd] No hardware decoding requested.
[vd] Using software decoding.
[vd] Detected 4 logical cores.
[vd] Requesting 5 threads for decoding.
[vd] Selected codec: mpeg4 (MPEG-4 part 2)
[vf] User filter list:
[vf] (empty)
[ad] Codec list:
[ad] ac3 - ATSC A/52A (AC-3)
[ad] ac3_fixed (ac3) - ATSC A/52A (AC-3)
[ad] Opening decoder ac3
[ad] Requesting 1 threads for decoding.
[ad] Selected codec: ac3 (ATSC A/52A (AC-3))
[af] User filter list:
[af] (empty)
[cplayer] Starting playback...
[af] [in] 48000Hz 5.1(side) 6ch floatp
[af] [userspeed] 48000Hz 5.1(side) 6ch floatp
[af] [userspeed] (disabled)
[af] [convert] 48000Hz 5.1(side) 6ch floatp
[vd] DR failed - disabling.
[vd] Using software decoding.
[vd] Decoder format: 720x400 yuv420p auto/auto/auto/auto/auto CL=mpeg2/4/h264
[vf] [in] 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[vf] [userdeint] 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[vf] [userdeint] (disabled)
[vf] [autorotate] 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[vf] [autorotate] (disabled)
[vf] [convert] 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[vf] [convert] (disabled)
[vf] [out] 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[ao] Trying audio driver 'wasapi'
[ao/wasapi] requested format: 48000 Hz, 5.1(side) channels, floatp
[ao/wasapi] No device specified. Selecting default.
[ao/wasapi] Selecting device '{93939c59-13a5-4126-8a9a-7dc148c1a2d0}' (Altavoces (High Definition Audio Device))
[ao/wasapi] Monitoring changes in device {0.0.0.00000000}.{93939c59-13a5-4126-8a9a-7dc148c1a2d0}
[ao/wasapi] Trying 5.1(side) float (32/32 bits) @ 48000hz (shared) -> close
[ao/wasapi] Closest match is stereo float (32/32 bits) @ 48000hz
[ao/wasapi] Accepted as stereo float @ 48000hz -> stereo float (32/32 bits) @ 48000hz (shared)
[ao/wasapi] Device period: 10 ms
[ao/wasapi] Buffer frame count: 2400 (50 ms)
[ao/wasapi] IAudioClock::GetFrequency gave a frequency of 384000.
[ao/wasapi] device buffer: 2400 samples.
[ao/wasapi] using soft-buffer of 9600 samples.
[cplayer] AO: [wasapi] 48000Hz stereo 2ch float
[cplayer] AO: Description: Windows WASAPI audio output (event mode)
[autoconvert] inserting resampler
[swresample] format change, reinitializing resampler
[swresample] 48000Hz 5.1(side) floatp -> 48000Hz stereo float
[swresample] Remix: 5.1(side) -> stereo
[af] [out] 48000Hz stereo 2ch float
[cplayer] VO: [gpu] 720x400 yuv420p
[cplayer] VO: Description: Shader-based GPU Renderer
[vo/gpu] reconfig to 720x400 yuv420p bt.601/bt.709/bt.1886/limited/display SP=1.000000 CL=mpeg2/4/h264
[vo/gpu/win32] reset window bounds: 440:237:720:400
[vo/gpu/win32] resize window: 720:400
[vo/gpu/win32] resize window: 720:400
[vo/gpu] Resize: 720x400
[vo/gpu] Window size: 720x400 (Borders: l=0 t=0 r=0 b=0)
[vo/gpu] Video source: 720x400 (1:1)
[vo/gpu] Video display: (0, 0) 720x400 -> (0, 0) 720x400
[vo/gpu] Video scale: 1.000000/1.000000
[vo/gpu] OSD borders: l=0 t=0 r=0 b=0
[vo/gpu] Video borders: l=0 t=0 r=0 b=0
[vo/gpu] Reported display depth: 8
[vo/gpu] Texture for plane 0: 720x400
[vo/gpu] Texture for plane 1: 360x200
[vo/gpu] Texture for plane 2: 360x200
[vo/gpu] Testing FBO format rgba16hf
[vo/gpu] Using FBO format rgba16hf.
[vo/gpu] No advanced processing required. Enabling dumb mode.
[vo/gpu] Resize: 720x400
[vo/gpu] Window size: 720x400 (Borders: l=0 t=0 r=0 b=0)
[vo/gpu] Video source: 720x400 (1:1)
[vo/gpu] Video display: (0, 0) 720x400 -> (0, 0) 720x400
[vo/gpu] Video scale: 1.000000/1.000000
[vo/gpu] OSD borders: l=0 t=0 r=0 b=0
[vo/gpu] Video borders: l=0 t=0 r=0 b=0
[vo/gpu] Reported display depth: 8
[vo/gpu/d3d11] shaderc compile status 'success' (0 errors, 0 warnings)
[vo/gpu/d3d11] Compiled a vertex shader in 168078us
[vo/gpu/d3d11] shaderc: 163835us, SPIRV-Cross: 835us, D3DCompile: 3408us
[vo/gpu/d3d11] shaderc compile status 'success' (0 errors, 0 warnings)
[vo/gpu/d3d11] Compiled a fragment shader in 10211us
[vo/gpu/d3d11] shaderc: 5148us, SPIRV-Cross: 465us, D3DCompile: 4598us
[cplayer] first video frame after restart shown
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[cplayer] audio ready
[cplayer] delaying audio start 0.000000 vs. -0.000000, diff=0.000000
[cplayer] playback restart complete @ -0.000000, audio=ready, video=playing
[statusline] AV: -00:00:00 / 02:57:09 (0%) A-V: 0.000 Cache: 426s/79MB
[cplayer] starting audio playback
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[statusline] AV: 00:00:00 / 02:57:09 (0%) A-V: 0.000 Cache: 559s/150MB
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
[statusline] AV: 00:00:00 / 02:57:09 (0%) A-V: 0.000 Cache: 559s/150MB
[osd/libass] fontselect: (sans-serif, 400, 0) -> ArialMT, 0, ArialMT
[osd/libass] fontselect: (mpv-osd-symbols, 400, 0) -> mpv-osd-symbols-Regular, 0, mpv-osd-symbols-Regular
[vo/gpu] Reallocating OSD texture to 1024x128.
[vo/gpu/d3d11] shaderc compile status 'success' (0 errors, 0 warnings)
[vo/gpu/d3d11] Compiled a vertex shader in 7287us
[vo/gpu/d3d11] shaderc: 3800us, SPIRV-Cross: 236us, D3DCompile: 3251us
[vo/gpu/d3d11] shaderc compile status 'success' (0 errors, 0 warnings)
[vo/gpu/d3d11] Compiled a fragment shader in 8231us
[vo/gpu/d3d11] shaderc: 4985us, SPIRV-Cross: 268us, D3DCompile: 2978us
[statusline] AV: 00:00:00 / 02:57:09 (0%) A-V: 0.000 Cache: 559s/150MB
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: user-data/osc/margins={"b":0,"t":0,"l":0,"r":0} -> 1
^Ctatusline] AV: 00:00:01 / 02:57:09 (0%) A-V: 0.000 Cache: 559s/150MB

Sample files

https://0x0.st/HO0Z.avi

Thanks!

Reproduce the issue with the provided mpv command and compare the verbose logs around FFmpeg AVI probing and stream-level seeks, including the seekable option variants. Trace the relevant stream-seek entry point and verify that large remote AVI files start promptly while time seeking remains available; no source file or test is named in the issue.