Re: [FFmpeg-devel] [PATCH v2] lavf/mxfenc: support creating s436m data tracks

[Marton Balint]

On Wed, 4 Jul 2018, Baptiste Coudurier wrote:

---
libavformat/mxf.c    |  1 +
libavformat/mxfdec.c |  2 ++
libavformat/mxfenc.c | 41 +++++++++++++++++++++++++++++++++++++----
libavformat/utils.c  |  6 +++++-
4 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/libavformat/mxf.c b/libavformat/mxf.c
index 8376a2b9bf..451cbcfb2c 100644
--- a/libavformat/mxf.c
+++ b/libavformat/mxf.c
@@ -28,6 +28,7 @@
const MXFCodecUL ff_mxf_data_definition_uls[] = {
    { { 
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 
}, 13, AVMEDIA_TYPE_VIDEO },
    { { 
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 
}, 13, AVMEDIA_TYPE_AUDIO },
+    { { 
0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x03,0x00,0x00,0x00 
}, 13, AVMEDIA_TYPE_DATA },
    { { 
0x80,0x7D,0x00,0x60,0x08,0x14,0x3E,0x6F,0x6F,0x3C,0x8C,0xE1,0x6C,0xEF,0x11,0xD2 
}, 16, AVMEDIA_TYPE_VIDEO }, /* LegacyPicture Avid Media Composer MXF */
    { { 
0x80,0x7D,0x00,0x60,0x08,0x14,0x3E,0x6F,0x78,0xE1,0xEB,0xE1,0x6C,0xEF,0x11,0xD2 
}, 16, AVMEDIA_TYPE_AUDIO }, /* LegacySound Avid Media Composer MXF */
    { { 
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 
},  0,  AVMEDIA_TYPE_DATA },
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index b76beb962f..575126d639 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -3299,6 +3299,8 @@ static int mxf_set_pts(MXFContext *mxf, AVStream *st, 
AVPacket *pkt)
            return ret;
    } else if (track) {
        track->sample_count++;
+        pkt->dts = pkt->pts = track->sample_count;
+        pkt->duration = 1;

You probably need to set pts before increasing sample_count.

Regards,
Marton
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