Created attachment 360192 [details] [review]
patch file attached

Hi ,
 In gst_webp_enc_handle_frame, missed Unmap video frame in failed case
 
 code:
 if (WebPEncode (&enc->webp_config, &enc->webp_picture)) {
    WebPPictureFree (&enc->webp_picture);

    out_buffer = gst_buffer_new_allocate (NULL, enc->webp_writer.size, NULL);
    if (!out_buffer) {
      GST_ERROR_OBJECT (enc, "Failed to create output buffer");
      return GST_FLOW_ERROR;
    }
    gst_buffer_fill (out_buffer, 0, enc->webp_writer.mem,
        enc->webp_writer.size);
    free (enc->webp_writer.mem);
  } else {
    GST_ERROR_OBJECT (enc, "Failed to encode WebPPicture");
    return GST_FLOW_ERROR;
  
  
  sol: gst_video_frame_unmap (&vframe); added 
  Patch attached. Please review and share feedback.