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Though you can use caption directly with video tag by using. We can add any number of audio playlist and captions to HLS playlist. We created a main playlist file where we mapped both video and audio playlist files. Here, we will upload an external audio track to video by following the same process of FFmpeg as we followed for video transcoding.Īfter audio file transcoding, we have another playlist file with many segment files. Now, by using this stream we can display our video. These segment files are mapped into a playlist file. m3u8 and many segment files having extension.
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The above piece of code will create a playlist with extension. Out_path – is where we stored our playlist and all segment file. Start_number – start the playlist sequence number from the specified number. If set to 0 the list file will contain all the segments. hls_list_size – set the maximum number of playlist entries. Segment will be cut on the next key frame after this time has passed.
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hls_time – set the target segment length in seconds. s – option is used to define stream size and bit rate. profile:v – specifies that input file is a video file, use “-profile:a” to input audio file. It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter.Ĭurrent_path – is path of our input file specified by the -i option. We used FFmpeg for that purpose.įfmpeg is a very fast video and audio converter that can also grab from a live audio/video source. We needed to convert our videos, audios into HLS stream. We used HLS with videojs to display our videos and audio and caption track switching.
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It resembles MPEG-DASH in that it works by breaking the overall stream into a sequence of small HTTP-based file downloads, each download loading one short chunk of an overall potentially unbounded transport stream. HTTP Live Streaming (also known as HLS) is an HTTP-based media streaming communications protocol implemented by Apple Inc. It was working fine for the captions but audios were not working as Chrome and Firefox does not support this feature yet.Īfter some digging over the internet we found out Apple’s HLS is such an option where we can use multiple audios. We were passing video URL in source tag and all the caption files in the track tag and audio files into an audio tag. And the user must be able to change the audio and captions at run-time. Recently, We were working on a project where we need to show a video with multiple audios and captions associated with it.