Hi James,
On 19/02/2019 17:14, James Almer wrote:
On 2/11/2019 1:59 PM, Guillaume Desmottes wrote:
CDG doesn't ensure a constant framerate as we can have holes in the CDG
stream. So there is no guarantee of the duration of a single frame, it
will be displayed until a new packet with CDG instruction arrives in the
stream.
Signed-off-by: Guillaume Desmottes <guillaume.desmot...@collabora.com>
---
libavformat/cdg.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/cdg.c b/libavformat/cdg.c
index 05cac6e528..078e985223 100644
--- a/libavformat/cdg.c
+++ b/libavformat/cdg.c
@@ -74,6 +74,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->stream_index = 0;
pkt->dts=
pkt->pts= pkt->pos / CDG_PACKET_SIZE;
+ pkt->duration = AV_NOPTS_VALUE;
The doxy says "0 if unknown", so AV_NOPTS_VALUE is not correct.
Just tried that, but by setting it to 0, compute_pkt_fields() set it
back to an actual value
which is exactly what I'm trying to avoid.
See https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/utils.c#L1303
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