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FFmpeg/tests/ref/fate/matroska-avoid-negative-ts
Andreas Rheinhardt d53acf452f avformat/matroskaenc: Don't write \0 unnecessarily
Writing the duration SimpleTag is special: It's size is
reserved in advance via an EBML Void element (if seekable)
and this reserved space is overwritten when writing the trailer;
it does not use put_ebml_string().

The string to write is created via snprintf on a buffer
of size 20; this buffer is then written via put_ebml_binary()
with a size of 20.

EBML strings need not be zero-terminated; if not, they
are implicitly terminated by the element's length field.
snprintf() always zero-terminates the buffer, i.e.
the last byte can be discarded when using an EBML string.
This patch does this.

The FATE changes are as expected: One byte saved for every
track; the only exception is the matroska-qt-mode test:
An additional byte is saved because an additional byte
could be saved from the enclosing Tags length field.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-08-10 23:56:35 +02:00

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dede1d72a28c7eb0a849acf230b08247 *tests/data/fate/matroska-avoid-negative-ts.matroska
973072 tests/data/fate/matroska-avoid-negative-ts.matroska
#extradata 0: 22, 0x2885037c
#tb 0: 1/1000
#media_type 0: video
#codec_id 0: mpeg2video
#dimensions 0: 352x288
#sar 0: 12/11
#tb 1: 1/1000
#media_type 1: audio
#codec_id 1: mp3
#sample_rate 1: 44100
#channel_layout_name 1: mono
0, -37, 43, 40, 9156, 0xe5bd034a, S=1, 40
1, 0, 0, 26, 417, 0x7198c15e
0, 3, 3, 40, 1740, 0x29ac4480, F=0x0
1, 26, 26, 26, 417, 0x3c67c32d
0, 43, 123, 40, 3672, 0x98652013, F=0x0
1, 52, 52, 26, 417, 0x8c24b1ca
1, 78, 78, 26, 417, 0x6ee576b7
0, 83, 83, 40, 2532, 0xa2c42769, F=0x0
1, 104, 104, 26, 417, 0x407603db
0, 123, 203, 40, 1728, 0xae823d3b, F=0x0
1, 130, 130, 26, 417, 0xcf2804d2
1, 156, 156, 26, 417, 0xcf2804d2
0, 163, 163, 40, 1028, 0x286ac52a, F=0x0
1, 182, 182, 26, 417, 0xcf2804d2
0, 203, 283, 40, 1916, 0xd378899e, F=0x0
1, 208, 208, 26, 417, 0xcf2804d2
1, 235, 235, 26, 417, 0xcf2804d2
0, 243, 243, 40, 1168, 0x424e12cf, F=0x0
1, 261, 261, 26, 417, 0xcf2804d2
0, 283, 363, 40, 1660, 0x5cec156c, F=0x0
1, 287, 287, 26, 417, 0xcf2804d2
1, 313, 313, 26, 417, 0xef163d04
0, 323, 323, 40, 1004, 0xac0dce29, F=0x0
1, 339, 339, 26, 417, 0x2a009b3a
0, 363, 443, 40, 3008, 0x0fc798bf, F=0x0
1, 365, 365, 26, 417, 0xbedccb9d
1, 365, 365, 26, 417, 0x2214be3f
1, 391, 391, 26, 417, 0x8953b878