Fixes ticket #10638 (and should also fix ticket #10482)
by restoring the behaviour from before
3c7dd5ed37.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
(cherry picked from commit 02064ba3a3)
Always use the functionality of the latter, which makes more sense as it
avoids losing keyframes due to vsync code dropping frames.
Deprecate the 'source_no_drop' value, as it is now redundant.
It is badly named (should have been -top_field_first, or at least -tff),
underdocumented and underspecified, and (most importantly) entirely
redundant with the setfield filter.
This function converts packet timestamps from the input stream timebase
to OutputStream.mux_timebase, which may or may not be equal to the
actual output AVStream timebase (and even when it is, this may not
always be the optimal choice due to bitstream filtering).
Just keep the timestamps in input stream timebase, they will be rescaled
as needed before bitstream filtering and/or sending the packet to the
muxer.
Move the av_rescale_delta() call for audio (needed to preserve accuracy
with coarse demuxer timebases) to write_packet.
Drop now-unused OutputStream.mux_timebase.
When -pix_fmt designates a BE/LE pixel format, it gets translated into
the native one by av_get_pix_fmt(). This may not always be the best
choice, as the encoder might only support one endianness. In such a
case, explicitly choose the endianness supported by the encoder.
While this is currently redundant with choose_pixel_fmt() in
ffmpeg_filter.c, the latter code will be deprecated in following commits.
map_func is supposed to be an array of const pointer to function
returning int, not an array of pointer to function returning const int.
Reported-By: Martin Storsjö
Read the timebase from FrameData rather than the input stream. This
should fix#10393 and generally be more reliable.
Replace the use of '-1' to indicate demuxing timebase with the string
'demux'. Also allow to request filter timebase with
'-enc_time_base filter'.
This line was added in c30a4489b4 along with
AVStream.sample_aspect_ratio. However, configuring SAR for video
encoding is now done after this code (specifically in enc_open(), which
is called when the first video frame to be encoded is obtained), so this
line cannot have any meaningful effect.
Replace duplicated(!) and broken* custom string parsing with
av_dict_parse_string(). Return error codes instead of aborting.
* e.g. it treats NULL returned from av_get_token() as "separator not
found", when in fact av_get_token() only returns NULL on memory
allocation failure
There is no reason to postpone it until opening the encoder. Also, abort
when the input stream is unknown, rather than disregard an explicit
request from the user.
Currently NULL would be passed for simple filtergraphs, which would
make the filter code extract the graph description from the output
stream when needed. This is unnecessarily convoluted.
Checking whether the user requested an unsupported conversion between
text and bitmap subtitles can be done immediately when creating the
output stream.
Andreas Rheinhardt
Anton Khirnov
James Almer