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rtpenc_vp8: Use 15-bit PictureIDs

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7-bit PictureIDs are not supported by WebRTC:
https://groups.google.com/g/discuss-webrtc/c/333-L02vuWA

In practice, 15-bit PictureIDs offer better compatibility.

Signed-off-by: Kevin Wang <kevin@muxable.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Kevin Wang 2022-03-22 14:25:11 -04:00 committed by Martin Storsjö
parent af6081273f
commit 8ae15b5655
1 changed files with 2 additions and 1 deletions
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libavformat/rtpenc_vp8.c
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@ -35,7 +35,8 @@ void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
// partition id 0
*s->buf_ptr++ = 0x90;
*s->buf_ptr++ = 0x80; // Picture id present
*s->buf_ptr++ = s->frame_count++ & 0x7f;
*s->buf_ptr++ = ((s->frame_count & 0x7f00) >> 8) | 0x80;
*s->buf_ptr++ = s->frame_count++ & 0xff;
// Calculate the number of remaining bytes
header_size = s->buf_ptr - s->buf;
max_packet_size = s->max_payload_size - header_size;