Merge pull request #534 from eisneinechse/interlace

Set the field order when interlace is on
OpenShot · Oct 16, 2020 · 7f08778 · 7f08778
2 parents 8cf0483 + 47fca02
commit 7f08778
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/FFmpegWriter.cpp b/src/FFmpegWriter.cpp
@@ -350,6 +350,14 @@ void FFmpegWriter::SetOption(StreamType stream, std::string name, std::string va
 		st = video_st;
 		// Get codec context
 		c = AV_GET_CODEC_PAR_CONTEXT(st, video_codec_ctx);
+		// Was a codec / stream found?
+		if (c) {
+			if (info.interlaced_frame) {
+				c->field_order = info.top_field_first ? AV_FIELD_TT : AV_FIELD_BB;
+				// We only use these two version and ignore AV_FIELD_TB and AV_FIELD_BT
+				// Otherwise we would need to change the whole export window
+			}
+		}
 	} else if (info.has_audio && stream == AUDIO_STREAM && audio_st) {
 		st = audio_st;
 		// Get codec context