Hi!
Looking at tickets #3823 and #4317 it seems to me that
FFmpeg currently only supports 4:2:0 subsampling when
sending jpeg over rtp. I believe an error should be
shown if 4:2:2 or 4:4:4 are provided.
Please comment, Carl Eugen
diff --git a/libavformat/rtpenc.c b/libavformat/rtpenc.c
index 31569d6..ab50ebb 100644
--- a/libavformat/rtpenc.c
+++ b/libavformat/rtpenc.c
@@ -102,6 +102,13 @@ static int rtp_write_header(AVFormatContext *s1)
return -1;
}
+ if ( st->codec->codec_id == AV_CODEC_ID_MJPEG
+ && st->codec->pix_fmt != AV_PIX_FMT_YUVJ420P
+ && st->codec->pix_fmt != AV_PIX_FMT_YUV420P) {
+ av_log(s1, AV_LOG_ERROR,
+ "Only 4:2:0 subsampling supported for (M)JPEG over rtp\n");
+ return AVERROR_PATCHWELCOME;
+ }
if (s->payload_type < 0) {
/* Re-validate non-dynamic payload types */
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