On Sun, May 28, 2023 at 11:14:08AM +0200, Anton Khirnov wrote:
> Set them in ifilter_parameters_from_dec(), similarly to audio/video
> streams. This reduces the extent to which sub2video filters need to be
> treated specially.
> ---
>  fftools/ffmpeg.c        |  6 ++---
>  fftools/ffmpeg_demux.c  | 21 +++++++++++++++++
>  fftools/ffmpeg_filter.c | 52 +++++++++++------------------------------
>  3 files changed, 38 insertions(+), 41 deletions(-)

The following prodeuces a 0 byte file after the patch
 -i ~/tickets/153/bbc_small.ts -filter_complex '[0:v][0:s]overlay' -qscale 2  -t 3 -y notcorrupt.avi

 https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket153/bbc_small.ts

thx

 [...]
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