[FFmpeg-devel] [PATCH 1/2] lavf/webvttenc: avio_flush() output

[Marton Balint]

On Tue, 10 Jun 2025, Andreas Rheinhardt wrote:

> Tomas Härdin:
>> Hi
>> 
>> These two patches are a bit of a warmup for another pass at streamable
>> subtitles. FATE passes.
>> 
>> /Tomas
>> 
> Users who want this should set the generic flush_packets options
> appropriately.

Agreed, explicit avio_flush() in packet writer functions is a bad idea 
because it flushes IO even on not latency critical outputs.

There is some magic in the flush_if_needed() function of mux.c, which by 
default uses avio_write_marker() to flush after every packet for streaming 
outputs only.

Regards,
Marton