Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Andreas Rheinhardt	dc2f6b54ac	avformat/matroskaenc: Avoid allocations for SeekHead Up until `e7ddafd5`, the Matroska muxer wrote two SeekHeads: One at the beginning referencing the main level 1 elements (i.e. not the Clusters) and one at the end, referencing the Clusters. This second SeekHead was useless and has therefore been removed. Yet the SeekHead-related functions and structures are still geared towards this usecase: They are built around an allocated array of variable size that gets reallocated every time an element is added to it although the maximum number of Seek entries is a small compile-time constant, so that one should rather include the array in the SeekHead structure itself; and said structure should be contained in the MatroskaMuxContext instead of being allocated separately. The earlier code reserved space for a SeekHead with 10 entries, although we currently write at most 6. Reducing said number implied that every Matroska/Webm file will be 84 bytes smaller and required to adapt several FATE tests; furthermore, the reserved amount overestimated the amount needed for for the SeekHead's length field and how many bytes need to be reserved to write a EBML Void element, bringing the total reduction to 89 bytes. This also fixes a potential segfault: If !mkv->is_live and if the AVIOContext is initially unseekable when writing the header, the SeekHead is already written when writing the header and this used to free the SeekHead-related structures that have been allocated. But if the AVIOContext happens to be seekable when writing the trailer, it will be attempted to write the SeekHead again which will lead to segfaults because the corresponding structures have already been freed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	5 years ago
Andreas Rheinhardt	0b61ddb576	avformat/matroskaenc: Don't waste bytes writing level 1 elements Up until now, the length field of most level 1 elements has been written using eight bytes, although it is known in advance how much space the content of said elements will take up so that it would be possible to determine the minimal amount of bytes for the length field. This commit changes this. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>	6 years ago
Andreas Rheinhardt	add68dcca9	avformat/matroskaenc: Write CRC-32 in non-seekable mode Given that in both the seekable as well as the non-seekable mode dynamic buffers are used to write level 1 elements and that now no seeks are used in the seekable case any more, the two modes can be combined; as a consequence, the non-seekable mode automatically inherits the ability to write CRC-32 elements. There are no differences in case the output is seekable; when it is not and writing CRC-32 elements is disabled, there can still be minor differences because before this commit, the EBML ID and length field were counted towards the cluster size limit; now they no longer are. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>	6 years ago
Andreas Rheinhardt	4e6df068b5	avformat/matroskaenc: Don't waste bytes in EBML Header Up until now the EBML Header length field has been written with eight bytes, although the EBML Header is always so small that only one byte is needed for it. This patch saves seven bytes for every Matroska/Webm file. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>	6 years ago
James Almer	3b189fae73	avformat/matroskaenc: write a CRC32 element on SeekHead Implements part of ticket #4347 Tested-by: Dave Rice <dave@dericed.com> Tested-by: Jerome Martinez <jerome@mediaarea.net> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: James Almer <jamrial@gmail.com>	8 years ago
James Almer	b33369b612	avformat/matroskaenc: don't reserve space for stream duration tags if the output is not seekable The durations are never written in that situation. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: James Almer <jamrial@gmail.com>	8 years ago
Sasi Inguva	31852540d4	libavformat/matroska: Write stream durations in metadata, in the format of mkvmerge. Compute individual stream durations in matroska muxer. Write them as string tags in the same format as mkvmerge tool does. Signed-off-by: Sasi Inguva <isasi@google.com>	9 years ago
Clément Bœsch	b60c445965	tests: add some ASS/SSA/MKS remux and transcode tests	10 years ago