[FFmpeg-devel] [PATCH] ffmpeg_demux: set default for readrate_catchup to be 5% faster

[Gyan Doshi]

On 2025-03-19 04:36 pm, Gyan Doshi wrote:
> The existing default value is the same as the primary readrate.
> This maintains the flow rate as best as possible but does not
> reduce the lag. This new value allows catchup to gradually happen
> without overwhelming the receiver.
>
> Addresses a concern brought up in #11469

Plan to push tomorrow.

Regards,
Gyan

> ---
>   fftools/ffmpeg_demux.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fftools/ffmpeg_demux.c b/fftools/ffmpeg_demux.c
> index b8171e336e..23216f6c13 100644
> --- a/fftools/ffmpeg_demux.c
> +++ b/fftools/ffmpeg_demux.c
> @@ -1892,7 +1892,7 @@ int ifile_open(const OptionsContext *o, const char *filename, Scheduler *sch)
>                      d->readrate_initial_burst);
>               return AVERROR(EINVAL);
>           }
> -        d->readrate_catchup = o->readrate_catchup ? o->readrate_catchup : d->readrate;
> +        d->readrate_catchup = o->readrate_catchup ? o->readrate_catchup : d->readrate * 1.05;
>           if (d->readrate_catchup < d->readrate) {
>               av_log(d, AV_LOG_ERROR,
>                      "Option -readrate_catchup is %0.3f; it must be at least equal to %0.3f.\n",