[FFmpeg-devel] [PATCH] avformat/apngenc: use the stream parameters extradata if no updated one is made available

[James Almer]

Fixes remuxing apng streams coming from the apng demuxer.
This is a regression since 97792e85c338d129342f5812e2a52048373e57d6.

Signed-off-by: James Almer <jamrial at gmail.com>
---
 libavformat/apngenc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavformat/apngenc.c b/libavformat/apngenc.c
index e5e8aa9..2b88dcc 100644
--- a/libavformat/apngenc.c
+++ b/libavformat/apngenc.c
@@ -101,6 +101,13 @@ static int apng_write_header(AVFormatContext *format_context)
     avio_wb64(format_context->pb, PNGSIG);
     // Remaining headers are written when they are copied from the encoder
 
+    apng->extra_data = av_mallocz(format_context->streams[0]->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (!apng->extra_data)
+        return AVERROR(ENOMEM);
+    apng->extra_data_size =  format_context->streams[0]->codecpar->extradata_size;
+    memcpy(apng->extra_data, format_context->streams[0]->codecpar->extradata,
+           format_context->streams[0]->codecpar->extradata_size);
+
     return 0;
 }
 
-- 
2.10.1