Fix webm packet reading, to correctly retry packets. Sometimes we must send more packets before receiving decoded data, and sometimes we need to receive more decoded data before sending more packets. We had a logic error in this code.

Author: jonoomph

src/FFmpegReader.cpp

@@ -1150,7 +1150,7 @@ bool FFmpegReader::GetAVFrame() {
 #if IS_FFMPEG_3_2
 	int send_packet_err = 0;
 	int64_t send_packet_pts = 0;
-	if ((packet && packet->stream_index == videoStream && !hold_packet) || !packet) {
+	if ((packet && packet->stream_index == videoStream) || !packet) {
 		send_packet_err = avcodec_send_packet(pCodecCtx, packet);
 
 		if (packet && send_packet_err >= 0) {