On 4/10/2021 11:12 PM, James Almer wrote:
Packets must have at least one of data or side_data. If none are available,
then got_packet must not be signaled.

The generic encode code already discarded these empty packets, but it's better
just not propagating them at all.

Signed-off-by: James Almer <jamr...@gmail.com>
---
This patchset supersedes "avcodec/libwebpenc_animencoder: Don't return pkt
without data/side-data" and "avformat/webpenc: Don't treat zero-sized packets
as invalid".

  libavcodec/libwebpenc_animencoder.c | 3 +--
  1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libavcodec/libwebpenc_animencoder.c 
b/libavcodec/libwebpenc_animencoder.c
index 7f35a0b939..633af2e925 100644
--- a/libavcodec/libwebpenc_animencoder.c
+++ b/libavcodec/libwebpenc_animencoder.c
@@ -102,10 +102,9 @@ static int libwebp_anim_encode_frame(AVCodecContext 
*avctx, AVPacket *pkt,
              goto end;
          }
- pkt->pts = pkt->dts = frame->pts;
          s->prev_frame_pts = frame->pts;  // Save for next frame.
          ret = 0;
-        *got_packet = 1;
+        *got_packet = 0;
end:
          WebPPictureFree(pic);

Will apply the set.
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