For 422 frames we should not use hard coded 8 to calculate mb size for
uv plane. Chroma shift should be taken into consideration to be
compatiple with different sampling format.
The error is reported by fate test when av_cpu_max_align() return 64
on the platform supporting AVX512. This is a hidden error and it is
exposed after commit 17a59a634c.
mpeg2enc has a mechanism to reuse frames. When it computes SSE (sum of
squared error) on current mb, reconstructed mb will be wrote to the
previous mb space, so that the memory can be saved. However if the align
is 64, the frame is shared in somewhere else, so the frame cannot be
reused and a new frame to store reconstrued data is created. Because the
height of mb is wrong when compute sse on 422 frame, starting from the
second line of macro block, changed data is read when frame is reused
(we need to read row 16 rather than row 8 if frame is 422), and unchanged
data is read when frame is not reused (a new frame is created so the
original frame will not be changed).
That is why commit 17a59a634c exposes this
issue, because it add av_cpu_max_align() and this function return 64 on
platform supporting AVX512 which lead to creating a frame in mpeg2enc,
and this lead to the different outputs.
Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
Some samples contain Active Format Descriptors, yet the output
of no test depends upon them, so that they are de-facto untested.
So add a dedicated test for them.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Fixes memleaks when the trailer is never written or when shift_data()
fails when writing the trailer.
Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
encode_send_frame_internal() is always only called if
the buffer packet is empty and except when we are dealing
with an audio codec that does not allow variable frame size
it stays that way until a call to av_frame_ref() at the end
of encode_send_frame_internal(). In case we are dealing
with the small last frame of an audio encoder requiring
constant frame size the frame will be allocated by pad_last_frame()
and this the only case where this is so. So by returning directly
after pad_last_frame(), we can avoid having to recheck
whether the frame is still empty before av_frame_ref().
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
These packets need not be writable (and are not modified by us),
so it is best to access them via const uint8_t*.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The packets given to decoder need not be writable,
so it is best to access them via const uint8_t*.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The packets given to muxers need not be writable,
so it is best to access them via const uint8_t*.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Some files I have from circa year 2000 are 16:9 NTSC DV video
encoded as QuickTime with Radius SoftDV. This marked 4:3 videos
with the box 'dvc ' for NTSC or 'dvcp' for PAL, which are already
supported, but 16:9 videos as 'dvl ' or 'dvlp', which were not.
Adding these to the list for DV codec processing gives the
expected metadata and playback.
I have not tested PAL as I have no sample data, only NTSC.
Signed-off-by: Marton Balint <cus@passwd.hu>
Dual mono files report a channel count of 2 with each individual channel in its
own SCE, instead of both in a single CPE as is the case with standard stereo.
This commit handles this non default channel configuration scenario.
Fixes ticket #1614
Signed-off-by: James Almer <jamrial@gmail.com>
regression since 13350e81fd
Fix looking for .ffmpeg subfolder in FFMPEG_DATADIR and inversely not in HOME.
Fix search order (documentation).
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
A cosmetic change only, it basically just changes the user facing error message
to clients that interpret the errors to something that makes sense.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Signed-off-by: Marton Balint <cus@passwd.hu>
Fixes: Use after free
Fixes: 47399/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLASHSV2_fuzzer-5718646686613504
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: signed integer overflow: 9223372036848019263 + 134232320 cannot be represented in type 'long'
Fixes: 48155/clusterfuzz-testcase-minimized-ffmpeg_dem_CINE_fuzzer-5751429207293952
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Also warn the user that for single images -update should be used, for sequences
a proper pattern should be specified.
Fixes ticket #9748.
Signed-off-by: Marton Balint <cus@passwd.hu>
In order to not generate 0 sized packets or create a huge index table
needlessly.
Fixes: Timeout
Fixes: 43717/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5206008287330304
Fixes: 45738/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6142535657979904
Signed-off-by: Marton Balint <cus@passwd.hu>
Modifying avformat_find_stream_info() behaviour based on the number of EAGAINs
it encounters is a hack which usually only hides the real issue if such thing
happen.
This reverts commit b0cac7082d.
av_fast_realloc and av_fast_mallocz? store the size of
the objects they allocate in an unsigned. Yet they overallocate
and currently they can allocate more than UINT_MAX bytes
in case a user has requested a size of about UINT_MAX * 16 / 17
or more if SIZE_MAX > UINT_MAX (and if the user increased
max_alloc_size via av_max_alloc). In this case it is impossible
to store the true size of the buffer via the unsigned*;
future requests are likely to use the (re)allocation codepath
even if the buffer is actually large enough because of
the incorrect size.
Fix this by ensuring that the actually allocated size
always fits into an unsigned. (This entails erroring out
in case the user requested more than UINT_MAX.)
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Add a short hand parameter for making a fixed size grid. The existing
xstack layout parameter syntax gets tedious if all one wants is a
matrix like grid of the input streams. Add a grid option to the xstack
filter that simplifies this use case by simply specifying the number of
rows and columns instead of specific x/y co-ordinate for each stream.
Also updating the filter documentation to explain the new option.
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
