Here is an experimental and much simpler solution that stores the last
used palette at keyframes regardless. Maybe too simple, Michael, I don't
know.
Mats
--
Mats Peterson
http://matsp888.no-ip.org/~mats/
>From f244806bf67595bf42d3449dccd3defd4433119d Mon Sep 17 00:00:00 2001
From: Mats Peterson <matsp...@yahoo.com>
Date: Sat, 5 Mar 2016 22:59:09 +0100
Subject: [PATCH] lavf/avienc: Store palette at keyframes
---
libavformat/avienc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index 0cfffb7..e80d2d8 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -696,7 +696,7 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
int ret2 = ff_get_packet_palette(s, opkt, ret, avist->palette);
if (ret2 < 0)
return ret2;
- if (ret2) {
+ if (ret2 || (pkt->flags & AV_PKT_FLAG_KEY)) {
int pal_size = 1 << enc->bits_per_coded_sample;
int pc_tag, i;
@@ -713,7 +713,8 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
memcpy(avist->old_palette, avist->palette, pal_size * 4);
avist->pal_offset = 0;
}
- if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
+ if (memcmp(avist->palette, avist->old_palette, pal_size * 4) ||
+ (pkt->flags & AV_PKT_FLAG_KEY)) {
avi_stream2fourcc(tag, stream_index, enc->codec_type);
tag[2] = 'p'; tag[3] = 'c';
pc_tag = ff_start_tag(pb, tag);
--
1.7.10.4
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