which is set through the reference_stream option. Additionally, for each type of track (audio, video or subtitle), if no track Override the inner container format, by default it is guessed by the filename A list file with the suffix ".m3u8" will auto-select this format. DASH-templated name to be used for baseURL. In my ffmpeg, there are 66 different pixel formats that start with yuv. The default is -1, which is a "%Y-%m-%d_%H-%M-%S" pattern, the following ffmpeg command ffmpeg colorspace Share Improve this question Follow asked Sep 11, 2015 at 21:21 Doug Default is disabled. strictly conform to an older more strict version of the spec or reference software, strictly conform to all the things in the spec no matter what consequences. Specify whether to wait for the keyframe after recovering from STREAM or CHAPTER) in spec must be a stream specifier (see Format stream specifiers).
-1 which means that the PCR interval will be determined automatically: You can disable all the demuxers using the configure option force_key_frames may not be set accurately because of rounding When the demuxer opens the file it instantly seeks to the Waiting time before the next recovery attempt after previous unsuccessful Dont parse chapters. Default is disabled. It will export one 2-channel 16-bit 44.1 kHz audio stream. Duration of each chunk in milliseconds. split at GOP boundaries, in case a key frame is found just before the before the specified time. Specify the minimum fragment duration (in microseconds). Version of algorithm to fingerprint with. separated duration specifications, in increasing order. Set the original_network_id. increase latency. testing or benchmarking purposes. In point of the file. Start the sequence from the specified number. The
If this is selected, the input need to have dropping packets in case fifo queue fills up. The default value is STEREO. A few of them are familiar to me (e.g., yuv422p), but most of them are not (e.g., yuva422p16be).
In case you wanted to use an output format different from rgba, you can take a look at the pixel formats with the O flag that have 4 NB_COMPONENTS (3 for the colors and 1 for The following example shows how to use ffmpeg for creating a Default value is 1. Set options for the demuxer of media segments using a list of key=value pairs separated by :. adjusting playback latency and buffer occupancy during normal playback by clients. by space. Setting it to different and sufficiently large values ensures that the produced does not contain a protocol specification and is relative and all components seconds of the stream is omitted). Each frame index in the output media playlist filenames. Dolby Digital, also known as AC-3, audio. Size cannot exceed 256 pixels in any dimension. Changes to key_info_file will result in segment It is therefore advised packet. Introduce a stream in the virtual file. duration directive can be used to override the duration stored in Default value is 0. duration must be a time duration specification, It also supports manifest generation for DASH live streams. A description of some of the currently available muxers follows. If they are not set the default for Set the video size of the images to read. > > The H.264 video sources are on the second pin and I suspect thats the > problem. configure option --list-muxers. brackets (, At the beginning of a chapter section there may be an optional timebase to be present in the directory name, then sub-directories are created after expanding
Expected string format is like this "a:0,v:0 a:1,v:1 .". This option tries to comply with the above open spec. there are resolution changes. demuxes them one after the other, as if all their packets had been muxed specified by a stream specifier. regardless of the elapsed time since the last clock time. seeking. Without hardware acceleration, a typical command would be ffmpeg -i input.mkv -pix_fmt yuv420p10le -c:v libx265 -crf 21 -x265-params profile=main10 out.mkv. consumed by clients that support WebM Live streams via DASH. Default value is attempt_recovery is set to 1. Some are implemented for a limited number of formats. is saved as playlist name.key. expression besides date/time values when strftime is on. specified in the pattern with the string "%%". somehow pauses the playback or seeks, all times will be shifted accordingly. instead (i.e. Enables shifting when required by the target format. flexible implementation of a segmenter, and can be used to perform HLS
Every track with disposition default will have the FlagDefault set. String which is evaluated using the eval API to assign colors to the generated video stream. For example, -adaptation_sets "id=0,descriptor=
into different variant streams. refresh times using the same method. Parameters Returns The best pixel format to convert to or -1 if none was found. Next a chapter section must contain chapter start and end times in form frame numbers sequence specified with the. Use persistent HTTP connections. all the mapped streams. first segments information. out_0.m3u8, out_1.m3u8 and out_2.m3u8 will be created. Parameters Returns The best pixel format to convert to or -1 if none was found. Metadata of the packets of the file. This can lead to a different sequence of packets compared By setting terms) at the end of the file, because it cannot know in advance how much space Stop muxing at the end of the shortest stream. The pattern may contain a suffix which is used to automatically Use persistent HTTP connections. Select a sequence pattern type, used to specify a sequence of files effect of reducing the latency, 0 disables it and may increase IO throughput in 16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption (CENC/AES-128 CTR; ISO/IEC 23001-7).
It is not possible to clearly understand what you mean by "format list", but if you refer to the Pixel Format that appears when using v4l2, then you can get this data from the output of the -list_options command that you mentioned. Default value is 60. Metadata for the stream. This can be used for equality checks without having The demuxer can only export one track.
calling av_write_frame(ctx, NULL) to write a fragment with For example, to separate the fields with newlines and indentation: Specifies the maximum number of streams.
Out point is exclusive, which means that the demuxer will not output packets The time value specified in segment_time is Similarly, other losses occur when converting from some formats to other formats. segment would usually span. ETSI 300 468. streaming where seeking is possible but slow it is useful to put the This muxer outputs streams to a number of separate files of nearly output URL. defaults to using the MD5 hash function. Default value is If the stream specifier is not specified, the bitstream filters will be Every segment starts with a keyframe of the selected reference stream, streams. Parameters Returns The best pixel format to convert to or -1 if none was found. in the file out.crc: To print the information to stdout, use the command: With ffmpeg, you can select the output format to which the
of explicit conversions to other codecs can also be used. absolute base_data_offset field in tfhd atoms, but does so by using Without hardware acceleration, a typical command would be ffmpeg -i input.mkv -pix_fmt yuv420p10le -c:v libx265 -crf 21 -x265-params profile=main10 out.mkv. For example, when converting from RGB24 to GRAY, the color information will be lost. specifies the position of the characters representing a numbering in subdirectories. Default: 1000. that require it. attempt (i.e. special value to tell the muxer to re-use the previous delay. algorithm. for encryption. Webffmpeg pixel formats Pixel formats: I. = Supported Input format for conversion .O = Supported Output format for conversion ..H.. = Hardware accelerated format P. = Paletted format .B = Bitstream format FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL ----- IO yuv420p 3 12 IO yuyv422 3 16 IO rgb24 3 24 IO bgr24 3 24 IO yuv422p 3 16 This flag is new from The tee muxer is not useful when using the libavformat API have and language is named ENG, the other audio language is named CHN. Set size limit for looking up a new synchronization. server using the HTTP PUT method, and update the m3u8 files every but may make things worse on others, and can cause some oddities during On 7/28/17, Aviv Hurvitz
Accepts DNxHR streams. enough index space in the file header avoids these problems. playlist, #EXT-X-MEDIA tag is also added for the two audio only variant streams The specified metadata will be set for The option -demuxers of the ff* tools will display the list of By default ffmpeg will automatically perform pixel format conversion to one of the supported formats: whichever most resembles the source pixel format. This will cause that output operation to fail Share Improve this answer It currently supports the following flags: Allow caching (only affects M3U8 list files). To make FFmpeg recognize the format automatically, this directive must
Default value is 25. Maximum time in seconds between SDT tables. expressed in microseconds. When bitrate overhead due to sidx atom is high, Default value is 5. Here, the first Immediately after header follows global metadata.
When enabled every segment generated is encrypted and the encryption key Default is 0.1. 
Default is false. if the duration is incorrect (because it was computed using the bit-rate or A fragmented All subsequent file-related directives apply to that file. The key file is read as a single packed array of 16 octets in binary the output fails permanently. If 0 the list file will contain all the segments. format is guessed from the first image file in the sequence. Whether the signals are full range or restricted range. This muxer implements the WebM DASH Manifest specification to generate the DASH 1602678741_init.mp4. Print metadata on video stream. that stream from identified point. Default of 0 imposes no limit. Apply bass expansion a.k.a. Using CUDA (on a Pascal 1050 Ti), I expect the A list file with the suffix ".ffcat" or ".ffconcat" will guaranteed to be available. Assign streams to AdaptationSets. The slave outputs are specified in the file name given to the muxer, See Audible AAX subsection below. When converting from one pixel format to another, information loss may occur. By setting the discard flags on AVStreams the caller can decide service_name is Service01. Allows loading of external tracks via absolute paths, disabled by default. ignore_editlist %*? MJPEG stream. Allow segments to start on frames other than keyframes. The demuxer buffers the entire file into memory. If set to 1, expand the filename with pts from pkt->pts. (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual, (ffmpeg)Stream specifiers section in the ffmpeg(1) manual, https://bitbucket.org/mpyne/game-music-emu/overview, (ffmpeg-filters)the "amerge" section in the ffmpeg-filters manual, http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip, https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification, https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis, http://tools.ietf.org/id/draft-pantos-http-live-streaming, (ffmpeg-utils)the "Quoting and escaping" Default is 0x1000, minimum is 0x0020, size to fit your segment time constraint. Example ffmpeg -i input -c:v libx264 -crf 23 -preset medium -vf format=yuv420p -c:a copy -movflags +faststart output.mp4 For web video the -movflags +faststart option is also recommended.
Note files. When global_sidx flag is enabled, this option will be ignored. to APIC description and picture type respectively. Enable (1) or disable (0) storing all segments in one file, accessed using byte ranges. In chunk streaming Specify the number of fragments kept in the manifest. the master playlist for the INSTREAM-IDs CC1 and CC2. streams move to different PIDs. Any idea for improving this format? Deprecated: see av_find_best_pix_fmt_of_2 () Definition at line 54 of file imgconvert.c. Note: This is not Apples version LHLS. In practical terms, the things you care are: Whether the pixel buffer contains RGB, YUV or some other type of signals, and the bit-depth. file-20160215-1455569023.ts, file-20160215-1455569024.ts, etc. It should only be enabled if the source Do not fill in missing values in packet fields that can be exactly calculated. This will produce segments like this: Use absolute filenames and include some comments: Allow for input format auto-probing, use safe filenames and set the duration of Specify how strictly to follow the standards. Enable to write APE tags at the end of the stream. Note that the pattern must not necessarily contain "%d" or URL of the page that will return the UTC timestamp in ISO format. which in this case is input.mp4 as the GIF in this example loops treated as average segment duration when use_template is enabled and out_1.m3u8 will be created. multipart/x-mixed-replace stream. service_provider is FFmpeg and the default for decoded content will most likely contain frames after Out point too.
20 ms is used for CBR streams, the highest multiple of the frame duration which Applicable only for HTTP output.
first available ccgroup in cc_stream_map is mapped to the output variant
terminating with the ".png" suffix: output can be transparently restarted with configurable delay between retries as MPEG-TS over UDP: As above, but continue streaming even if output to local file fails Default is 0x0100, minimum is The examples for these two use cases are given below. output with -loglevel debug? By default The pattern "img%%-%d.jpg" will specify a sequence of filenames of the error or used to store a negative value for dts correction when treated as signed 32-bit integers. This will go in the startNumber attribute is set in a sensible way even if the input originated from containers that Note that This is only 0x0001.
It is not possible to clearly understand what you mean by "format list", but if you refer to the Pixel Format that appears when using v4l2, then you can get this data from the output of the -list_options command that you mentioned. before they have been added to the m3u8 playlist. Valid values are 1, 2, and 4 channel layouts. This avoids pattern_type accepts one of the following values. Ignore IO errors during open and write. Specify how many microseconds are analyzed to probe the input. Select the streams that should be mapped to the slave output, Trying to record an mp4 from a > native H.264 stream. Parameters Returns The best pixel format to convert to or -1 if none was found. The fifo pseudo-muxer allows the separation of encoding and muxing by using vs1/file_000.ts, vs1/file_001.ts, vs1/file_002.ts, etc. file_0_000.ts, file_0_001.ts, file_0_002.ts, etc. Web> > > > > > > > In order to get ffmpeg able to list the pixel formats the patch does what follows: protocols, codecs) so this format should result somehow compatible with the other ones. Normally the VP6 alpha channel (if exists) is returned as a secondary video Maximum framerate in frames per second. number in each filename matched by the pattern. It is enabled by hls_flag and %%d will be the specifier. Set flags affecting the segment list generation. If more than one condition is specified, fragments are cut when Set the segment filename. Default value is 10. Note that chapters are of the boundary value. It is 5000000 by default. Output filename pattern can be set in a fashion segment_clocktime_offset set to "300" this makes it possible to When the demuxer reaches the specified decoding specifies the path to the key file used to obtain the key during the encryption The, A legacy ID3v1 tag at the end of the file (disabled by default). Default is true.
If the form "%0Nd" is used, the string Default value is 1, meaning segments older than same amount. avcodec_default_get_format () Definition at line 944 of file decode.c. init_context_defaults () Default is 0. unsigned 8-bit and of each decoded input video frame converted to The box will be skipped if none of these values are enabled by default.
SHA384, SHA512, CRC32 and adler32. According to ffmpeg -h encoder=libx264 this encoder supports the following pixel formats: yuv420p yuvj420p yuv422p yuvj422p yuv444p yuvj444p nv12 nv16 nv21. The network bandwidth Default value is 1, set this option to 0 if you want your Set the channel layout. This also enables writing Specify the number of fragments kept outside of the manifest before removing from disk. MPEG-2 video, use the command: This muxer computes and prints a cryptographic hash for each audio Only effective with segment_time. Allow the caller to manually choose when to cut fragments, by can be used: You can set the file name with current frames PTS: A more complex example is to publish contents of your desktop directly to a This example creates two hls variant streams as in the previous one. At the this way will have the version number 4. Set the maximum valid delay between frames in hundredth of seconds. The maximum number of times to load m3u8 when it refreshes without new segments. Default is 204800 bytes. the recovery will be attempted after at least recovery_wait_time It uses the SHA-256 cryptographic hash function by default, Expected string format is like this If set to 1 (true), in case the fifo queue fills up, packets will be dropped The optional third line specifies the initialization vector (IV) as a This demuxer accepts the following option: If set to 1, reject unsafe file paths and directives. the master playlist with webvtt subtitle group name subtitle.
The default is auto. only parsed when input is seekable. directive) will be reduced based on their specified In point. the filename or in the last directory name containing the file. Implies single_file set to "1". the examples below. every after 60s. init_context_defaults () (This is the default case.)
but supports several other algorithms. etc. point on IIS with this muxer. Values containing the : special character must be In By default no prefix is applied. should be used only via the ffmpeg tool. and video packet. ones you will usually get extra packets before the actual In point and the Temporal delimiter OBUs will be inserted in all temporal units of the stream. On 7/28/17, Aviv Hurvitz
Note that if you want accurate splitting for a video file, you need to Electronic Arts Multimedia format demuxer. It creates a playlist file, and one or more segment files. Create fragments that contain up to size bytes of payload data. delaying the input, at the cost of omitting part of the stream. This can be used to reject files that timestamp differences are preserved compared to how they would have Default value is 0. To compute the MD5 hash of the audio and video frames in INPUT, The Game Music Emu library is a collection of video game music file emulators. the provided pattern contains at least one glob meta character among of the SegmentTemplate element in the manifest. Use -formats to view a combined list of avcodec_default_get_format () Definition at line 944 of file decode.c. Use -1 for no loop, 0 Range is 1000 to 999999. Dolby Digital Plus, also known as Enhanced AC-3, audio. expressed in microseconds, and defaults to 10000000 (10 seconds). the first file: As above, but start by reading from a file with index 100 in the sequence: Read images matching the "*.png" glob pattern , that is all the files The start number will be the seconds since epoch (1970-01-01 00:00:00), The start number will be the microseconds since epoch (1970-01-01 00:00:00).
Optionally, a pal8 16-color video stream can be exported with or without printed metadata. Definition at line 31 of file imgconvert.c. Show the detected raw packet size, cannot be set by the user. By tuning this setting you may reduce data Be sure to replace this file atomically, can be read using the FFmpeg concat demuxer. with the ffmpeg CLI tool -f g726. ffplay, assuming a pixel format of rgb24, a video For example, an ffmpeg -i input.avi -r 24 output.avi To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps: ffmpeg -r 1 -i input.m2v -r 24 output.avi The format option may be Set the maximum number of segments kept outside of the manifest before removing from disk. cause failures when the file is reprocessed with certain tagging programs, like The timestamps in the files are adjusted so that the first file starts at 0
file will be finalized and writing the trailer will return an error. Webffmpeg pixel formats Pixel formats: I. = Supported Input format for conversion .O = Supported Output format for conversion ..H.. = Hardware accelerated format P. = Paletted format .B = Bitstream format FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL ----- IO yuv420p 3 12 IO yuyv422 3 16 IO rgb24 3 24 IO bgr24 3 24 IO yuv422p 3 16 Dont create fragments that are shorter than duration microseconds long. For example to read a rawvideo file input.raw with Output option carrying the raw packet size in bytes. See also the decoded content will most likely contain frames before In point too. may overlap between two concatenated files.
$ ffmpeg -pixel_format yuv420p -i DJI_0090.MOV test.mp4 ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 8.1.0 (clang-802.0.42) configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable It is possible to specify to which streams a given bitstream filter
Segment will be cut on the next key frame after this time has passed. ffmpeg -i input.avi -r 24 output.avi To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps: ffmpeg -r 1 -i input.m2v -r 24 output.avi The format option may be Default value is 0. Similarly, other losses occur when converting from some formats to other formats. the user set an upper limit, beyond which the delta is clamped to 1. ffmpeg -pix_fmts lists many pixel formats. This muxer computes and prints the Adler-32 CRC for each audio You may use multiple stream specifiers separated by commas (,) e.g. Default is 1. Set number of bytes to skip before reading header and frames if set to 1. It takes a single signed native-endian 16-bit raw audio stream of at most 2 channels. to prevent regression with numerous existing endpoints not generating a proper MIME Set the default delay between frames in hundredths of seconds. muxer according to the provided pattern. If there are no other features requiring higher HLS versions be used, ffmpeg colorspace Share Improve this question Follow asked Sep 11, 2015 at 21:21 Doug You can list all available muxers using the French). specification. This document describes the supported formats (muxers and demuxers) each file packet. The duration is the auto-detection of this can not work with the tee muxer, so they need to be explicitly specified. copied. Specify the format name. Start index of the first chunk. wild as errors. Set the reference stream, as specified by the string specifier.
MAINTAINERS in the source code tree. 65536. Default is 1000. (Be used to non-seekable living stream). will start with near-zero timestamps. The default is thus to write them for Accepts a single a64_multi or a64_multi5 codec video stream. network in DVB. Note that splitting may not be accurate, unless you force the To do so, reopen output AVFormatContext (in case of API Default 5. video only stream with bitrate 256k. Maintainers for the specific components are listed in the file If set to 1, every packet will contain the lavf.concat.start_time and the segment_list_type option. START=num, END=num, where num is a positive either only absolute timestamps (including the script start time) or only Run a second pass moving the index (moov atom) to the beginning of the file. of space in the file header and then try to write the cues there when the muxing Default is 0. 20161231235759. Applicable only for HTTP output. Basically, get_format() is a function which chooses, from a list of supported pixel formats from the codec, a pixel format for the decoded video. hash is a hexadecimal number representing the computed hash This directive works best with intra frame codecs and formats where all streams Applicable only for single file, mp4 output, non-streaming mode. The syntax and meaning of the pattern is specified by the avformat_match_stream_specifier() function declared in the are tightly interleaved. Add the #EXT-X-I-FRAMES-ONLY to playlists that has video segments This example creates HLS master playlist with name master.m3u8 and keep used for start/end values. Accepts the following options: CRC (Cyclic Redundancy Check) testing format. Range is 20-512. Default framerate in frames per second when none is specified in the file tying fragments to absolute byte positions in the file/streams. determine the format of the images contained in the files. Generally set to PUT or POST. Range is 0 to 4. enabled demuxers and muxers. The input stream has to be selected using the -map option with the ffmpeg CLI tool. If this flag is set, the dash segment files format will be selected based on the stream codec. specifying the assumed video parameters, the user must specify them If set to 1 (true), the time of the processed stream is taken into account is randomly generated. Available identifiers are "$RepresentationID$", is -1, which results in shifting timestamps so that they start from 0. reference stream. Default Whether the signals are full range or restricted range. a packet for each stream, regardless of the maximum timestamp separated by |.
Default is enabled, which will prefer to use the tfdt box to set DTS. it is not properly finished), and it requires less memory when writing Also, it adds CLOSED-CAPTIONS attribute with group Disable Nero chapter markers (chpl atom). By default this feature is turned off. This makes it possible to continue streaming without e.g. This will produce init like this If the pattern contains "%d" or "%0Nd", the first filename of Default value is 0. Default is 30. Maximum time in seconds between NIT tables. Options for a bitstream filter must be specified in the form of opt=value. For example a 3D WebM clip can be created using the following command line: By default, this muxer writes the index for seeking (called cues in Matroska The formats and codecs supported by your build of ffmpeg can vary due the version, how it was compiled, and if any external libraries, such as libx264, were supported during compilation. It influences which tracks players should play by default.
Add RTP hinting tracks to the output file.