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avformat/mxfenc: use a zero based continuity counter

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The standard does not seem to require the counter to be zero based, but some
checker tools (MyriadBits MXFInspect, Interra Baton) have validations against 0
start...

Fixes ticket #6781.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2020-02-29 01:25:56 +01:00
parent 6e1913a02e
commit 121b6c7aa7
3 changed files with 4 additions and 4 deletions
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2
libavformat/mxfenc.c
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@ -2686,7 +2686,7 @@ static void mxf_write_system_item(AVFormatContext *s)
avio_w8(pb, mxf->content_package_rate); // content package rate
avio_w8(pb, 0x00); // content package type
avio_wb16(pb, 0x00); // channel handle
avio_wb16(pb, (mxf->tc.start + frame) & 0xFFFF); // continuity count, supposed to overflow
avio_wb16(pb, frame & 0xFFFF); // continuity count, supposed to overflow
if (mxf->essence_container_count > 1)
avio_write(pb, multiple_desc_ul, 16);
else {

2
tests/ref/fate/mxf-user-comments
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@ -1 +1 @@
683bacb0105e5bc5bbf46aa430c644d1
c6469c0ae2aaee602eacbc009080ae8e

4
tests/ref/lavf/mxf
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@ -1,7 +1,7 @@
649009e3d3d62eb3b6c56334d057cc4d *tests/data/lavf/lavf.mxf
27b98795036b334e100c15c7e06d948f *tests/data/lavf/lavf.mxf
526393 tests/data/lavf/lavf.mxf
tests/data/lavf/lavf.mxf CRC=0x8dddfaab
9076b7015cffe8aa72883e900a2041a5 *tests/data/lavf/lavf.mxf
783b475a818602f54e947094d57e2981 *tests/data/lavf/lavf.mxf
561721 tests/data/lavf/lavf.mxf
tests/data/lavf/lavf.mxf CRC=0x96ff1b48
02bf8f0cd8951a49e277306691cb1538 *tests/data/lavf/lavf.mxf