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| author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2019-12-29 10:20:42 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-04-13 08:43:14 +0200 |
| commit | ccadd00a4a720979c6d4cedb52713c2585dd5b03 (patch) | |
| tree | f979aea0664a60412fc10ed2dc7d665d5af0225d /tests/fate/wavpack.mak | |
| parent | 358b58cb290defe706dd2f5bae96b29321059dfe (diff) | |
| download | ffmpeg-ccadd00a4a720979c6d4cedb52713c2585dd5b03.tar.gz | |
avformat/matroskaenc: Make output more deterministic
Using random values for TrackUID and FileUID (as happens when the
AVFMT_FLAG_BITEXACT flag is not set) has the obvious downside of making
the output indeterministic. This commit mitigates this by writing the
potentially random values with a fixed size of eight byte, even if their
actual values would fit into less than eight bytes. This ensures that
even in non-bitexact mode, the differences between two files generated
with the same settings are restricted to a few bytes in the header.
(Namely the SegmentUID, the TrackUIDs (in Tracks as well as when
referencing them via TagTrackUID), the FileUIDs (in Attachments as
well as in TagAttachmentUID) as well as the CRC-32 checksums of the
Info, Tracks, Attachments and Tags level-1-elements.) Without this
patch, there might be an offset/a size difference between two such
files.
The FATE-tests had to be updated because the fixed-sized UIDs are also
used in bitexact mode.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Diffstat (limited to 'tests/fate/wavpack.mak')
| -rw-r--r-- | tests/fate/wavpack.mak | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tests/fate/wavpack.mak b/tests/fate/wavpack.mak index bc7a5cc92f..e3cf4ec632 100644 --- a/tests/fate/wavpack.mak +++ b/tests/fate/wavpack.mak @@ -91,12 +91,12 @@ fate-wavpack-matroskamode: CMD = md5 -i $(TARGET_SAMPLES)/wavpack/special/matros FATE_WAVPACK-$(call DEMMUX, WV, MATROSKA) += fate-wavpack-matroska_mux-mono fate-wavpack-matroska_mux-mono: CMD = md5pipe -i $(TARGET_SAMPLES)/wavpack/num_channels/mono_16bit_int.wv -c copy -fflags +bitexact -f matroska fate-wavpack-matroska_mux-mono: CMP = oneline -fate-wavpack-matroska_mux-mono: REF = a9da0444604848080b08e32de19f42d9 +fate-wavpack-matroska_mux-mono: REF = 7ebd447336f0ba76b41a3f32d1551f05 FATE_WAVPACK-$(call DEMMUX, WV, MATROSKA) += fate-wavpack-matroska_mux-61 fate-wavpack-matroska_mux-61: CMD = md5pipe -i $(TARGET_SAMPLES)/wavpack/num_channels/eva_2.22_6.1_16bit-partial.wv -c copy -fflags +bitexact -f matroska fate-wavpack-matroska_mux-61: CMP = oneline -fate-wavpack-matroska_mux-61: REF = 60812e377937456863a3c899ee068060 +fate-wavpack-matroska_mux-61: REF = c95bca3c3023230a324c633942c453d5 FATE_SAMPLES_AVCONV += $(FATE_WAVPACK-yes) fate-wavpack: $(FATE_WAVPACK-yes) |