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path: root/doc/ffmpeg.texi
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* doc/ffmpeg: improve -r documentationAnton Khirnov2023-01-10
| | | | Explain different behavior for encoding and streamcopy.
* doc/ffmpeg.texi: drop a non-existent optionAnton Khirnov2023-01-10
| | | | | -ilme has not existed for 17 years, since 637b5326f3441b53e2f1004085c4d570ba2d7758
* ffmpeg: Add display_{rotation, hflip, vflip} optionsJan Ekström2022-10-19
| | | | | | | | | This enables overriding the rotation as well as horizontal/vertical flip state of a specific video stream on the input side. Additionally, switch the singular test that was utilizing the rotation metadata to instead override the input display rotation, thus leading to the same result.
* fftools/ffmpeg: drop the -async optionAnton Khirnov2022-10-04
| | | | | | | | | | | | It has been deprecated in favor of the aresample filter for almost 10 years. Another thing this option can do is drop audio timestamps and have them generated by the encoding code or the muxer, but - for encoding, this can already be done with the setpts filter - for muxing this should almost never be done as timestamp generation by the muxer is deprecated, but people who really want to do this can use the setts bitstream filter
* doc/ffmpeg: update -map documentationAnton Khirnov2022-08-08
| | | | | Make it match reality (current text was not updated for stream specifiers), extend and clarify the text.
* fftools/ffmpeg: deprecate specifying a sync stream with -mapAnton Khirnov2022-08-08
| | | | It has not had any effect whatsoever for over 10 years.
* fftools/ffmpeg: deprecate the -map_channel optionAnton Khirnov2022-07-28
| | | | | It is now entirely redundant with audio filters, and is in fact implemented by setting up a 'pan' filter instance.
* fftools/ffmpeg: deprecate -psnrAnton Khirnov2022-07-28
| | | | It is entirely redundant with -flags +psnr.
* fftools/ffmpeg: move each muxer to a separate threadAnton Khirnov2022-07-23
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* fftools/ffmpeg: rework -shortest implementationAnton Khirnov2022-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* ffmpeg: add option -isyncGyan Doshi2022-07-14
| | | | | | | | | | | | This is a per-file input option that adjusts an input's timestamps with reference to another input, so that emitted packet timestamps account for the difference between the start times of the two inputs. Typical use case is to sync two or more live inputs such as from capture devices. Both the target and reference input source timestamps should be based on the same clock source. If either input lacks starting timestamps, then no sync adjustment is made.
* doc/ffmpeg: correct description of -shortestGyan Doshi2022-07-04
| | | | | | -shortest stops 'recording' when the shortest output stream ends. The native or even seek-adjusted duration of the source input stream isn't considered.
* doc/ffmpeg: fix typo in VCD creation exampleMarton Balint2022-06-12
| | | | | | Fixes ticket #9753. Signed-off-by: Marton Balint <cus@passwd.hu>
* ffmpeg: add option fps_modeGyan Doshi2022-06-11
| | | | | | | fps_mode sets video sync per output stream. Overrides vsync for matching streams. vsync is deprecated.
* doc/ffmpeg: fix typo in ffmpeg.texiNetSysFire2022-05-10
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* ffmpeg: deprecate passing numbers to -vsyncAnton Khirnov2021-12-07
| | | | | There is never a reason to do this, using symbolic names is always preferred.
* ffmpeg: make -bits_per_raw_sample a per-output-stream optionAnton Khirnov2021-12-04
| | | | Also, document it and make it apply to audio in addition to video.
* avutil/hwcontext_cuda: add option to use primary device contextTimo Rothenpieler2021-11-22
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* ffmpeg: rewrite setting the stream dispositionAnton Khirnov2021-11-16
| | | | | | | | | | | | | | | | | | | | | Currently, the code doing this is spread over several places and may behave in unexpected ways. E.g. automatic 'default' marking is only done for streams fed by complex filtergraphs. It is also applied in the order in which the output streams are initialized, which is effectively random. Move processing the dispositions at the end of open_output_file(), when we already have all the necessary information. Apply the automatic default marking only if no explicit -disposition options were supplied by the user, and apply it to the first stream of each type (excluding attached pics) when there is more than one stream of that type and no default markings were copied from the input streams. Explicitly document the new behavior. Changes the results of some tests, where the output file gets a default disposition, while it previously did not.
* libavutil/hwcontext_qsv: add usage child_device_type argument to explicitly ↵Artem Galin2021-09-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | select d3d11va/DX11 device type UPD: Rebase of last patch set over current master and use DX9 as default device type. Makes selection of dxva2/DX9 device type by default as before with explicit d3d11va/DX11 usage to cover more HW configurations. Added warning message to expect changing default device type in the future. Fixes TGL / AV1 decode as requires DX11 with explicit DX11 type selection. Add headless/multi adapter support and fixes: https://trac.ffmpeg.org/ticket/7511 https://trac.ffmpeg.org/ticket/6827 http://ffmpeg.org/pipermail/ffmpeg-trac/2017-November/041901.html https://trac.ffmpeg.org/ticket/7933 https://github.com/InitialForce/FFmpeg/commit/338fbcd5bba1de0e1b3e3bad8985eee2fdfbeca1 https://github.com/jellyfin/jellyfin/issues/2626#issuecomment-602153952 Any other fixes are welcome including OpenCL interop patch since I don't have proper setup to validate this use case Decoding, encoding, transcoding have been validated. child_device_type option is responsible for d3d11va/dxva2 device selection Usage examples: DirectX 11: -init_hw_device qsv:hw,child_device_type=d3d11va -init_hw_device qsv:hw,child_device_type=d3d11va,child_device=0 OR -init_hw_device d3d11va=dx -init_hw_device qsv@dx DirectX 9 is still supported but requires explicit selection: -init_hw_device qsv:hw,child_device_type=dxva2 OR -init_hw_device dxva2=dx -init_hw_device qsv@dx Signed-off-by: Artem Galin <artem.galin@intel.com>
* ffmpeg: add option readrateGyan Doshi2021-07-17
| | | | | | | Allows to read inputs at arbitrary rates. -re is equivalent to -readrate 1 Tested with -copyts {+ start_at_zero}, -ss, streamcopied & decoded streams.
* fftools/ffmpeg: Add new variant source_no_drop to the force_key_frames optionKeyun Tong2021-07-16
| | | | Suggested-By: ffmpeg@fb.com
* ffmpeg: add option recast_mediaGyan Doshi2021-07-11
| | | | | Allows forcing decoders of different media type. Needed to decode media data muxed as data streams.
* doc/ffmpeg: document reinit_filterGyan Doshi2021-06-10
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* doc/ffmpeg: clarify what -hwaccels list indicatesGyan Doshi2021-04-03
| | | | Fixes #8204
* doc/ffmpeg: document parameters set by -targetGyan Doshi2021-03-19
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* ffmpeg: add -fpsmax to clamp output framerateGyan Doshi2021-02-05
| | | | Useful when encoding in batch or with aberrant inputs.
* doc/ffmpeg: document apad optionGyan Doshi2021-01-31
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* doc/ffmpeg: document adrift_thresholdGyan Doshi2021-01-23
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* doc/ffmpeg: restore location of stray passageGyan Doshi2021-01-23
| | | | | Added in 88fc1438c69, this passage was separated from its original context over the years with unrelated entries sandwiched in between.
* doc/ffmpeg: document max_error_rateGyan Doshi2021-01-10
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* ffmpeg: add option stats_periodGyan Doshi2020-12-23
| | | | | | | | | At present, progress stats are updated at a hardcoded interval of half a second. For long processes, this can lead to bloated logs and progress reports. Users can now set a custom period using option -stats_period Default is kept at 0.5 seconds.
* ffmpeg: add a data size threshold for muxing queue sizeJan Ekström2020-10-29
| | | | | | | | | | | | | | | | | | | | | | | | | This way the old max queue size limit based behavior for streams where each individual packet is large is kept, while for smaller streams more packets can be buffered (current default is at 50 megabytes per stream). For some explanation, by default ffmpeg copies packets from before the appointed seek point/start time and puts them into the local muxing queue. Before, it getting utilized was much less likely since as soon as the filter chain was initialized, the encoder (and thus output stream) was also initialized. Now, since we will be pushing the encoder initialization to when the first AVFrame is decoded and filtered - which only happens after the exact seek point is hit as packets are ignored until then - this queue will be seeing much more usage. In more layman's terms, this attempts to fix cases such as where: - seek point ends up being 5 seconds before requested time. - audio is set to copy, and thus immediately begins filling the muxing queue. - video is being encoded, and thus all received packets are skipped until the requested time is hit.
* doc: include general in *-all pages.Nicolas George2020-09-08
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* ffmpeg: add auto_conversion_filters option.Nicolas George2020-09-08
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* fftools/ffmpeg: make specifying thread_queue_size turn on threaded inputMarton Balint2020-07-29
| | | | | | | | Threaded input can increase smoothness of e.g. x11grab significantly. Before this patch, in order to activate threaded input the user had to specify a "dummy" additional input, with this change it is no longer required. Signed-off-by: Marton Balint <cus@passwd.hu>
* fftools/ffmpeg_filter: add -autoscale to disable/enable the default scaleLinjie Fu2020-06-18
| | | | | | | | | | | | | | | | | | | | | Currently, ffmpeg inserts scale filter by default in the filter graph to force the whole decoded stream to scale into the same size with the first frame. It's not quite make sense in resolution changing cases if user wants the rawvideo without any scale. Using autoscale/noautoscale as an output option to indicate whether auto inserting the scale filter in the filter graph: -noautoscale or -autoscale 0: disable the default auto scale filter inserting. ffmpeg -y -i input.mp4 out1.yuv -noautoscale out2.yuv -autoscale 0 out3.yuv Update docs. Suggested-by: Mark Thompson <sw@jkqxz.net> Reviewed-by: Nicolas George <george@nsup.org> Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com> Signed-off-by: Linjie Fu <linjie.fu@intel.com>
* doc/ffmpeg: remove reference to deprecated optionMoritz Barsnick2020-06-09
| | | | | | | | | The "-deinterlace" was deprecated since d7edd35, over eight years ago. Refer to deinterlacing filters instead. Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
* fftools/ffmpeg: add new abort_on flag which aborts if there is a stream ↵Marton Balint2020-05-26
| | | | | | which received no packets Signed-off-by: Marton Balint <cus@passwd.hu>
* hwcontext_vulkan: let users enable device and instance extensions using optionsLynne2020-05-10
| | | | | | Also documents all options supported by the hwdevice. This lets users enable all extensions they need without writing their own instance initialization code.
* doc/ffmpeg: Document device selection for VulkanMark Thompson2020-02-09
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* doc/ffmpeg: document value source for -force_key_framesGyan Doshi2020-01-05
| | | | Also clarify behaviour in case of specified timestamps
* doc/ffmpeg: -timelimit is in user timeLou Logan2019-09-27
| | | | | Signed-off-by: Lou Logan <lou@lrcd.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
* doc/ffmpeg: Document dts_error_threshold optionJun Zhao2019-08-08
| | | | | | Document dts_error_threshold option. Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
* doc/ffmpeg: muxdelay and muxpreload are output optionsAman Gupta2019-03-20
| | | | Signed-off-by: Aman Gupta <aman@tmm1.net>
* doc/ffmpeg: remove entry for -loop_outputGyan Doshi2019-03-20
| | | | Option doesn't exist .. hasn't for a few years now.
* doc/ffmpeg: add entry for itsscaleGyan Doshi2019-03-16
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* doc/ffmpeg: clarify behaviour of -discardGyan Doshi2019-01-04
| | | | | Discarding all frames is universally supported as it happens in fftools whereas selective discarding relies on the demuxer.
* doc/ffmpeg: update entry for stream disable optionsGyan Doshi2019-01-04
| | | | -vn/-an/-sn/-dn can now be used to block input streams from a file.
* ffmpeg: mark sseof as an input-only optionGyan Doshi2018-06-09
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