文件列表:

LICENSE (18047, 2017-09-09)
presets.py (2831, 2017-09-09)
segmenter (10860, 2017-09-09)

# HLS-segmenter HLS Segmenter is a configurable python script to achieve Http Live Streaming segmentation, playlist and variants playlist from a given movie file. HLS Segmenter use ffmpeg, and works great on Linux. ## Segmenter DEPENDENCIES: FFmpeg * Tested with FFmpeg 2.5.8 on Ubuntu 15.04 * Tested with FFmpeg 2.*** on Debian 8 (http://www.deb-multimedia.org/) CONFIGURE: You can create "Profiles" in presets.py (see existing ones to get an idea). USE: ./segmenter -i *video_path* [-u *url_prefix*] [-p] * -i *video_path* indicate the path to the input video file * it can be either relative (to the script execution path) or absolute. * -u *url_prefix* allow to prepend an url to the playlists path, i.e. : **http://yourserver/videofolder/** * This base url should reach the input video folder location. * -p only regenerate the variant playlist but do not re-encode the chunks (dryrun) Let say your input media is /var/www/video/**mymovie.mp4**: And that you have a webserver with http://localhost/ linked to /var/www/ The command will be ./segmenter -i /var/www/video/mymovie.mp4 -u http://localhost/video/ It will create a new directory /var/www/video/**mymovie**/ next to the input video location, with * a re-encoded version of the intput movie, using the first profile (can be use as a fallback for players without HLS support) also named /var/www/video/**mymovie**/**mymovie.mp4** * the main variant playlist file .m3u8, which link to the profile's playlists named /var/www/video/**mymovie**/**mymovie.m3u8** * subdirectories for each quality profile, hosting the chunks and the associated playlist. To play the HLS stream you only need to provide the movie.m3u8 url, like this http://localhost/video/mymovie/mymovie.m3u8 And if your client doesn't support HLS you can fallback to http://localhost/video/mymovie/mymovie.mp4 which is a re-encode of your original movie with the first preset in the list. Your original movie should still be available from there: http://localhost/video/mymovie.mp4 ## TODO ### Segmenter * Add more options to the segmenter command line: * Output path * Segments size (it can be defined in presets.py at SEGMENT_SIZE) * FFmpeg preset for h2*** encoding (it can be defined in presets.py at FFMPEG_PRESET) * Ability to choose specific profiles * Reorganize the Presets / Profiles file * Auto disable profiles with higher bitrate/resolution than the original media * validate HLS flux compatibility (using Apple provided tools) * https://developer.apple.com/library/ios/technotes/tn2235/_index.html * https://developer.apple.com/streaming/ (Download section) * check if I-Frame can be optimized (at the beggining) * monitor: http://stackoverflow.com/questions/14005110/how-to-split-a-video-using-ffmpeg-so-that-each-chunk-starts-with-a-key-frame/14011638#14011638 * After segementation: http://video.stackexchange.com/questions/4904/how-to-force-ffmpeg-to-insert-keyframe-at-first-frame-when-downsampling-a-framer * alternative solution to segment: https://www.ffmpeg.org/ffmpeg-formats.html#Examples-5 ### HLS Dealer * Create a small HTTP file server to distribute the M3U8 playlists and chunks * Proper MIME Type ## RESSOURCES ### EXEMPLE MAIN VARIANT M3U8 PLAYLIST command: ./segmenter -i /var/www/myvideo.mp4 -u http://localhost/ it will generate the main playlist at url: http://localhost/myvideo/myvideo.m3u8 ``` #EXTM3U #EXT-X-STREAM-INF:BANDWIDTH=244400,RESOLUTION=416x234 http://localhost/myvideo/0-ugly/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=421120,RESOLUTION=416x234 http://localhost/myvideo/1-bad/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=733200,RESOLUTION=480x270 http://localhost/myvideo/2-tiny/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=1182145,RESOLUTION=***0x360 http://localhost/myvideo/3-low/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=2192834,RESOLUTION=***0x360 http://localhost/myvideo/4-medium/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=5888165,RESOLUTION=960x540 http://localhost/myvideo/5-high/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=8663048,RESOLUTION=1280x720 http://localhost/myvideo/6-hd/stream.m3u8 ``` ### BITRATE EVALUATION FFmpeg can report the bitrate of the ts stream. Use the ffprobe tool and you'll get output like this: ffprobe ./myvideo/3-low/3-low3.ts (the third chunk for the "low" profile) ``` Input #0, mpegts, from '3-low3.ts': Duration: 00:00:02.00, start: 7.423222, bitrate: 851 kb/s Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Video: h2*** (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, ***0x360 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 93 kb/s ``` The bitrate is being given in kilobits per second, so multiply it by 1024 and you'll have the value you need for the BANDWIDTH tag.

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