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avformat/rtpenc: Add flag AVFMT_NODIMENSIONS.

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Not all rtp formats require the video dimensions to be available
up front. H264 and HEVC will send them as stream parameters.
The flag is restrictive and prevents RTP repacketization
without parsing the codec information out of the stream.

This change checks to see if the codec parameters are available
on the rtp formats that need it.

Signed-off-by: Koushik Dutta <koushd@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Koushik Dutta
2025-03-26 13:13:13 -07:00
committed by Michael Niedermayer
parent 5fac8d062d
commit 2657e1679e
1 changed files with 9 additions and 1 deletions
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10
libavformat/rtpenc.c
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@ -635,10 +635,18 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
rtp_send_ilbc(s1, pkt->data, size);
break;
case AV_CODEC_ID_MJPEG:
if (st->codecpar->width <= 0 || st->codecpar->height <= 0) {
av_log(s1, AV_LOG_ERROR, "dimensions not set\n");
return AVERROR(EINVAL);
}
ff_rtp_send_jpeg(s1, pkt->data, size);
break;
case AV_CODEC_ID_BITPACKED:
case AV_CODEC_ID_RAWVIDEO: {
if (st->codecpar->width <= 0 || st->codecpar->height <= 0) {
av_log(s1, AV_LOG_ERROR, "dimensions not set\n");
return AVERROR(EINVAL);
}
int interlaced = st->codecpar->field_order != AV_FIELD_PROGRESSIVE;
ff_rtp_send_raw_rfc4175(s1, pkt->data, size, interlaced, 0);
@ -685,5 +693,5 @@ const FFOutputFormat ff_rtp_muxer = {
.write_packet = rtp_write_packet,
.write_trailer = rtp_write_trailer,
.p.priv_class = &rtp_muxer_class,
.p.flags = AVFMT_TS_NONSTRICT,
.p.flags = AVFMT_NODIMENSIONS | AVFMT_TS_NONSTRICT,
};