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rtmp: Send video on a separate channel.

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Sending non-monotonic packets (e.g. when the audio and video
streams are monotonic within themselves but not muxed
monotonically) will lead to negative values the RTMP timestamp
field (where timestamps are transmitted only as deltas for each
channel), and this delta can end up being incorrectly written as
a large unsigned number.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Josh Allmann 2013-09-16 13:20:56 -07:00 committed by Martin Storsjö
parent 68b4677420
commit 120af23cd5
1 changed files with 6 additions and 2 deletions
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8
libavformat/rtmpproto.c
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@ -2637,6 +2637,7 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
if (rt->flv_header_bytes < 11) {
const uint8_t *header = rt->flv_header;
int copy = FFMIN(11 - rt->flv_header_bytes, size_temp);
int channel = RTMP_SOURCE_CHANNEL;
bytestream_get_buffer(&buf_temp, rt->flv_header + rt->flv_header_bytes, copy);
rt->flv_header_bytes += copy;
size_temp -= copy;
@ -2650,16 +2651,19 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
bytestream_get_be24(&header);
rt->flv_size = pktsize;
if (pkttype == RTMP_PT_VIDEO)
channel = RTMP_VIDEO_CHANNEL;
//force 12bytes header
if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) ||
pkttype == RTMP_PT_NOTIFY) {
if (pkttype == RTMP_PT_NOTIFY)
pktsize += 16;
rt->prev_pkt[1][RTMP_SOURCE_CHANNEL].channel_id = 0;
rt->prev_pkt[1][channel].channel_id = 0;
}
//this can be a big packet, it's better to send it right here
if ((ret = ff_rtmp_packet_create(&rt->out_pkt, RTMP_SOURCE_CHANNEL,
if ((ret = ff_rtmp_packet_create(&rt->out_pkt, channel,
pkttype, ts, pktsize)) < 0)
return ret;