URL of the page that will return the UTC timestamp in ISO format. Example: "https://time.akamai.com/?iso"
@item -http_user_agent @var{user_agent}
Override User-Agent field in HTTP header. Applicable only for HTTP output.
+@item -http_persistent @var{http_persistent}
+Use persistent HTTP connections. Applicable only for HTTP output.
@item -hls_playlist @var{hls_playlist}
Generate HLS playlist files as well. The master playlist is generated with the filename master.m3u8.
One media playlist file is generated for each stream with filenames media_0.m3u8, media_1.m3u8, etc.
+@item -streaming @var{streaming}
+Enable (1) or disable (0) chunk streaming mode of output. In chunk streaming
+mode, each frame will be a moof fragment which forms a chunk.
@item -adaptation_sets @var{adaptation_sets}
Assign streams to AdaptationSets. Syntax is "id=x,streams=a,b,c id=y,streams=d,e" with x and y being the IDs
of the adaptation sets and a,b,c,d and e are the indices of the mapped streams.
To map all video (or audio) streams to an AdaptationSet, "v" (or "a") can be used as stream identifier instead of IDs.
When no assignment is defined, this defaults to an AdaptationSet for each stream.
+@item -timeout @var{timeout}
+Set timeout for socket I/O operations. Applicable only for HTTP output.
@end table
@anchor{framecrc}
files will be relative to the current working directory.
When use_localtime_mkdir is set, the whole expanded value of @var{filename} will be written into the m3u8 segment list.
+When @code{var_stream_map} is set with two or more variant streams, the
+@var{filename} pattern must contain the string "%v", this string specifies
+the position of variant stream index in the generated segment file names.
+@example
+ffmpeg -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k \
+ -map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" \
+ -hls_segment_filename 'file_%v_%03d.ts' out_%v.m3u8
+@end example
+This example will produce the playlists segment file sets:
+@file{file_0_000.ts}, @file{file_0_001.ts}, @file{file_0_002.ts}, etc. and
+@file{file_1_000.ts}, @file{file_1_001.ts}, @file{file_1_002.ts}, etc.
+
+The string "%v" may be present in the filename or in the last directory name
+containing the file. If the string is present in the directory name, then
+sub-directories are created after expanding the directory name pattern. This
+enables creation of segments corresponding to different variant streams in
+subdirectories.
+@example
+ffmpeg -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k \
+ -map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" \
+ -hls_segment_filename 'vs%v/file_%03d.ts' vs%v/out.m3u8
+@end example
+This example will produce the playlists segment file sets:
+@file{vs0/file_000.ts}, @file{vs0/file_001.ts}, @file{vs0/file_002.ts}, etc. and
+@file{vs1/file_000.ts}, @file{vs1/file_001.ts}, @file{vs1/file_002.ts}, etc.
@item use_localtime
Use strftime() on @var{filename} to expand the segment filename with localtime.
@item hls_fmp4_init_filename @var{filename}
set filename to the fragment files header file, default filename is @file{init.mp4}.
+When @code{var_stream_map} is set with two or more variant streams, the
+@var{filename} pattern must contain the string "%v", this string specifies
+the position of variant stream index in the generated init file names.
+The string "%v" may be present in the filename or in the last directory name
+containing the file. If the string is present in the directory name, then
+sub-directories are created after expanding the directory name pattern. This
+enables creation of init files corresponding to different variant streams in
+subdirectories.
+
@item hls_flags @var{flags}
Possible values:
the keys to specify audio, video and subtitle streams respectively.
Allowed values are 0 to 9 (limited just based on practical usage).
+When there are two or more variant streams, the output filename pattern must
+contain the string "%v", this string specifies the position of variant stream
+index in the output media playlist filenames. The string "%v" may be present in
+the filename or in the last directory name containing the file. If the string is
+present in the directory name, then sub-directories are created after expanding
+the directory name pattern. This enables creation of variant streams in
+subdirectories.
+
@example
ffmpeg -re -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k \
-map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" \
- http://example.com/live/out.m3u8
+ http://example.com/live/out_%v.m3u8
@end example
This example creates two hls variant streams. The first variant stream will
contain video stream of bitrate 1000k and audio stream of bitrate 64k and the
second variant stream will contain video stream of bitrate 256k and audio
-stream of bitrate 32k. Here, two media playlist with file names out_1.m3u8 and
-out_2.m3u8 will be created.
+stream of bitrate 32k. Here, two media playlist with file names out_0.m3u8 and
+out_1.m3u8 will be created.
@example
ffmpeg -re -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k \
-map 0:v -map 0:a -map 0:v -f hls -var_stream_map "v:0 a:0 v:1" \
- http://example.com/live/out.m3u8
+ http://example.com/live/out_%v.m3u8
@end example
This example creates three hls variant streams. The first variant stream will
be a video only stream with video bitrate 1000k, the second variant stream will
be an audio only stream with bitrate 64k and the third variant stream will be a
video only stream with bitrate 256k. Here, three media playlist with file names
-out_1.m3u8, out_2.m3u8 and out_3.m3u8 will be created.
+out_0.m3u8, out_1.m3u8 and out_2.m3u8 will be created.
+@example
+ffmpeg -re -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k \
+ -map 0:v -map 0:a -map 0:v -map 0:a -f hls -var_stream_map "v:0,a:0 v:1,a:1" \
+ http://example.com/live/vs_%v/out.m3u8
+@end example
+This example creates the variant streams in subdirectories. Here, the first
+media playlist is created at @file{http://example.com/live/vs_0/out.m3u8} and
+the second one at @file{http://example.com/live/vs_1/out.m3u8}.
+@example
+ffmpeg -re -i in.ts -b:a:0 32k -b:a:1 64k -b:v:0 1000k -b:v:1 3000k \
+ -map 0:a -map 0:a -map 0:v -map 0:v -f hls \
+ -var_stream_map "a:0,agroup:aud_low a:1,agroup:aud_high v:0,agroup:aud_low v:1,agroup:aud_high" \
+ -master_pl_name master.m3u8 \
+ http://example.com/live/out_%v.m3u8
+@end example
+This example creates two audio only and two video only variant streams. In
+addition to the #EXT-X-STREAM-INF tag for each variant stream in the master
+playlist, #EXT-X-MEDIA tag is also added for the two audio only variant streams
+and they are mapped to the two video only variant streams with audio group names
+'aud_low' and 'aud_high'.
By default, a single hls variant containing all the encoded streams is created.
+@item cc_stream_map
+Map string which specifies different closed captions groups and their
+attributes. The closed captions stream groups are separated by space.
+Expected string format is like this
+"ccgroup:<group name>,instreamid:<INSTREAM-ID>,language:<language code> ....".
+'ccgroup' and 'instreamid' are mandatory attributes. 'language' is an optional
+attribute.
+The closed captions groups configured using this option are mapped to different
+variant streams by providing the same 'ccgroup' name in the
+@code{var_stream_map} string. If @code{var_stream_map} is not set, then the
+first available ccgroup in @code{cc_stream_map} is mapped to the output variant
+stream. The examples for these two use cases are given below.
+
+@example
+ffmpeg -re -i in.ts -b:v 1000k -b:a 64k -a53cc 1 -f hls \
+ -cc_stream_map "ccgroup:cc,instreamid:CC1,language:en" \
+ -master_pl_name master.m3u8 \
+ http://example.com/live/out.m3u8
+@end example
+This example adds @code{#EXT-X-MEDIA} tag with @code{TYPE=CLOSED-CAPTIONS} in
+the master playlist with group name 'cc', langauge 'en' (english) and
+INSTREAM-ID 'CC1'. Also, it adds @code{CLOSED-CAPTIONS} attribute with group
+name 'cc' for the output variant stream.
+@example
+ffmpeg -re -i in.ts -b:v:0 1000k -b:v:1 256k -b:a:0 64k -b:a:1 32k \
+ -a53cc:0 1 -a53cc:1 1\
+ -map 0:v -map 0:a -map 0:v -map 0:a -f hls \
+ -cc_stream_map "ccgroup:cc,instreamid:CC1,language:en ccgroup:cc,instreamid:CC2,language:sp" \
+ -var_stream_map "v:0,a:0,ccgroup:cc v:1,a:1,ccgroup:cc" \
+ -master_pl_name master.m3u8 \
+ http://example.com/live/out_%v.m3u8
+@end example
+This example adds two @code{#EXT-X-MEDIA} tags with @code{TYPE=CLOSED-CAPTIONS} in
+the master playlist for the INSTREAM-IDs 'CC1' and 'CC2'. Also, it adds
+@code{CLOSED-CAPTIONS} attribute with group name 'cc' for the two output variant
+streams.
+
@item master_pl_name
Create HLS master playlist with the given name.
@item http_persistent
Use persistent HTTP connections. Applicable only for HTTP output.
+@item timeout
+Set timeout for socket I/O operations. Applicable only for HTTP output.
+
@end table
@anchor{ico}
projects / ffmpeg / blobdiff