[FFmpeg-trac] #10467(undetermined:new): Avisynth input hangs before transcode starts

[FFmpeg]

#10467: Avisynth input hangs before transcode starts
-------------------------------------+-------------------------------------
             Reporter:  truehd       |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Description changed by truehd:

Old description:

> Summary of the bug:
> Having an .avs input causes a long hang before successfully transcoding
> (to prores here but it seems to be encoder independent).
> Log has thousands of lines of:
> {{{
> [rawvideo @ 000001eeb94f8240] PACKET SIZE: 8294400, STRIDE: 7680
> [vost#0:0/prores_ks @ 000001eeb94f9440] cur_dts is invalid [init:0
> i_done:0 finish:0] (this is harmless if it occurs once at the start per
> stream)
> }}}
> Code to reproduce:
> {{{
> % ffmpeg -i "input.avs" -ss 19:15 -to 19:34 -c:v prores_ks -profile:v hq
> -quant_mat:v 6 -pix_fmt yuv422p10le -an "output.mov"
> ffmpeg version 2023-07-10-git-1c61c24f5f-full_build-www.gyan.dev
> }}}
> Avisynth+ version 3.7.2

New description:

 Summary of the bug:
 Having an .avs input causes a long hang before successfully transcoding
 (to prores here but it seems to be encoder independent).
 Log has thousands of lines of:
 {{{
 [rawvideo @ 000001eeb94f8240] PACKET SIZE: 8294400, STRIDE: 7680
 [vost#0:0/prores_ks @ 000001eeb94f9440] cur_dts is invalid [init:0
 i_done:0 finish:0] (this is harmless if it occurs once at the start per
 stream)
 }}}
 Code to reproduce:
 {{{
 % ffmpeg -i "input.avs" -ss 19:15 -to 19:34 -c:v prores_ks -profile:v hq
 -quant_mat:v 6 -pix_fmt yuv422p10le -an "output.mov"
 ffmpeg version 2023-07-10-git-1c61c24f5f-full_build-www.gyan.dev
 }}}
 Avisynth+ version 3.7.2
 Platform: Windows 11 22H2

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Ticket URL: <https://trac.ffmpeg.org/ticket/10467#comment:1>
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