On date Wednesday 2024-03-27 11:51:31 +0100, Tobias Rapp wrote:
> Depending on the filters used the filtergraph can produce trailing data
> after feeding it the last input frame. Update the example to include the
> necessary loop for draining the filtergrap.
>
> Signed-off-by: Tobias Rapp <t.r...@noa-archive.com>
> ---
> doc/examples/decode_filter_video.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/doc/examples/decode_filter_video.c
> b/doc/examples/decode_filter_video.c
> index 454c192..a57e6df 100644
> --- a/doc/examples/decode_filter_video.c
> +++ b/doc/examples/decode_filter_video.c
> @@ -276,6 +276,25 @@ int main(int argc, char **argv)
> }
> av_packet_unref(packet);
> }
> + if (ret == AVERROR_EOF) {
> + /* signal EOF to the filtergraph */
> + if (av_buffersrc_add_frame_flags(buffersrc_ctx, NULL, 0) < 0) {
> + av_log(NULL, AV_LOG_ERROR, "Error while closing the
> filtergraph\n");
> + goto end;
> + }
> +
> + /* pull remaining frames from the filtergraph */
> + while (1) {
> + ret = av_buffersink_get_frame(buffersink_ctx, filt_frame);
> + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
> + break;
how are we supposed to handle the EAGAIN case? Shouldn't this be a
sleep and retry?
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