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Haihao Xiang efc22e63e5 lavfi/vf_vpp_qsv: fix the time_base for outlink 
Since commit 89ffcd1, the status pts of the output link is set to a
value in the input link time base, not in the output link time base when
EOF is reached. Usually this pst value is larger than the required one
because the output link time base is more greater than the input link
time base. When "-vf vpp_qsv,fps" is used, user has to wait a long time
for the ending of the pipeline because fps filter output a huge number
of frames until the wrong status pts is hit.

The issue can be triggered with the command below (use a clip with 1000
frames in this case):

$> time ffmpeg -hwaccel qsv -c:v hevc_qsv -i input.h265 -vf
"vpp_qsv=w=1920:h=1080,fps=fps=30" -f null -
...
[out_0_0 @ 0x564ccd27e020] 10000000 buffers queued in out_0_0, something
may be wrong.
frame=40119596 fps=88080 q=-0.0 Lsize=N/A time=371:28:39.96 bitrate=N/A
speed=2.94e+03x
video:17238889kB audio:0kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: unknown

real    9m7.451s
user    2m34.102s
sys     0m39.734s

In order to avoid the above issue, the same time base for input and
ouput links is used in this patch.

Fixes ticket #9286

Signed-off-by: Zhong Li <zhongli_dev@126.com>
2021-06-20 23:05:03 +08:00
compat
doc doc/mailing-list-faq.texi: remove remaining references to Freenode 2021-06-18 19:21:11 -03:00
ffbuild ffbuild: Avoid using the --preprocessor argument to windres 2021-06-18 11:19:02 +03:00
fftools ffmpeg: silence a thread_safe_callbacks deprecation warning 2021-06-10 21:57:44 -03:00
libavcodec lavc/qsvdec: fix pts 2021-06-20 23:04:35 +08:00
libavdevice
libavfilter lavfi/vf_vpp_qsv: fix the time_base for outlink 2021-06-20 23:05:03 +08:00
libavformat avformat/rmdec: Check old_format len for overflow 2021-06-18 18:58:25 +02:00
libavutil avutil/tx: avoid negative left shifts 2021-06-18 18:58:25 +02:00
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README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.