FFmpeg

109645 Commits

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400 Tags

479 MiB

Tag: Branch: Tree: c13d959343

Commit Graph

Author	SHA1	Message	Date
Andreas Rheinhardt	71364c54d4	fate/ffmpeg: Use transcode instead of enc_dec in shortest-sub test enc_dec is designed for raw input and output and computes the PSNR between these two. The input of the shortest-sub test is the idx file of a vobsub sub+idx combination and the output is the output of framecrc of said vobsub subtitle muxed into Matroska together with a synthesized video. Calculating the PSNR between these two files makes no sense, therefore switch to a transcode test, where the ref file file contains the output of framecrc directly, making the interleavement better visible in the ref file at the cost of a larger ref file (>400 lines). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	2 years ago
Anton Khirnov	4740fea7dd	fftools/ffmpeg: rework -shortest implementation The -shortest option (which finishes the output file at the time the shortest stream ends) is currently implemented by faking the -t option when an output stream ends. This approach is fragile, since it depends on the frames/packets being processed in a specific order. E.g. there are currently some situations in which the output file length will depend unpredictably on unrelated factors like encoder delay. More importantly, the present work aiming at splitting various ffmpeg components into different threads will make this approach completely unworkable, since the frames/packets will arrive in effectively random order. This commit introduces a "sync queue", which is essentially a collection of FIFOs, one per stream. Frames/packets are submitted to these FIFOs and are then released for further processing (encoding or muxing) when it is ensured that the frame in question will not cause its stream to get ahead of the other streams (the logic is similar to libavformat's interleaving queue). These sync queues are then used for encoding and/or muxing when the -shortest option is specified. A new option – -shortest_buf_duration – controls the maximum number of queued packets, to avoid runaway memory usage. This commit changes the results of the following tests: - copy-shortest[12]: the last audio frame is now gone. This is correct, since it actually outlasts the last video frame. - shortest-sub: the video packets following the last subtitle packet are now gone. This is also correct.	3 years ago
Anton Khirnov	d55b8dbcff	fate/ffmpeg: add a test for interleaving video+subs	3 years ago

Author

SHA1

Message

Date

Andreas Rheinhardt

71364c54d4

fate/ffmpeg: Use transcode instead of enc_dec in shortest-sub test

enc_dec is designed for raw input and output and computes
the PSNR between these two. The input of the shortest-sub
test is the idx file of a vobsub sub+idx combination
and the output is the output of framecrc of said vobsub
subtitle muxed into Matroska together with a synthesized
video. Calculating the PSNR between these two files makes
no sense, therefore switch to a transcode test, where
the ref file file contains the output of framecrc directly,
making the interleavement better visible in the ref file
at the cost of a larger ref file (>400 lines).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2 years ago

Anton Khirnov

4740fea7dd

fftools/ffmpeg: rework -shortest implementation

The -shortest option (which finishes the output file at the time the
shortest stream ends) is currently implemented by faking the -t option
when an output stream ends. This approach is fragile, since it depends
on the frames/packets being processed in a specific order. E.g. there
are currently some situations in which the output file length will
depend unpredictably on unrelated factors like encoder delay. More
importantly, the present work aiming at splitting various ffmpeg
components into different threads will make this approach completely
unworkable, since the frames/packets will arrive in effectively random
order.

This commit introduces a "sync queue", which is essentially a collection
of FIFOs, one per stream. Frames/packets are submitted to these FIFOs
and are then released for further processing (encoding or muxing) when
it is ensured that the frame in question will not cause its stream to
get ahead of the other streams (the logic is similar to libavformat's
interleaving queue).

These sync queues are then used for encoding and/or muxing when the
-shortest option is specified.

A new option – -shortest_buf_duration – controls the maximum number of
queued packets, to avoid runaway memory usage.

This commit changes the results of the following tests:
- copy-shortest[12]: the last audio frame is now gone. This is
  correct, since it actually outlasts the last video frame.
- shortest-sub: the video packets following the last subtitle packet are
  now gone. This is also correct.

3 years ago

Anton Khirnov

d55b8dbcff

fate/ffmpeg: add a test for interleaving video+subs

3 years ago

3 Commits (c13d95934327ddad4db30f6aee93cd2aa6a26a57)