experimental: Youtube Live Events Streaming #206
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ghost
assigned 
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'Step one' has been completed - an RTMP streaming plugin is implemented and appears to be working. The next steps will quite possibly be something like the following: Acquire a Live Events enabled Youtube account, as well as a Developer key. For the Youtube authentication, I am under the understanding that Mitchell was working on a youtube-uploader (however, since not much was done on the youtube-interface yet on our end, we haven’t looked into how the work could overlap, and from what I know now, I understand it’s part of the cli functionality). What we might want to include is a Youtube authentication UI, which takes the user’s username and pass, and retrieves an authentication token, which our app can use to perform api calls on the user’s behalf. The user can then manage (create, update, start, end, delete) a live event. My initial thoughts were that, since a ‘live event’ is somewhat similar to a ‘presentation’, include live-event specific functionality into the talk editor. However, if that is not the case, perhaps a separate interface, which could provide a title, summary, and start time, could be built, and manage the live event separately. The work that has been done was for the backend Youtube API interface. It has not been tested, but has been designed to build API requests, and send them (populating them with data from a ‘Presentation’ object, but this can be changed to be something more generic). Parsing API requests also still needs to be implemented, as well as some research and design into ‘CDN’ configuration, and whether it is necessary to have those settings accurate. More information can be found here [https://developers.google.com/youtube/2.0/developers_guide_protocol_managing_live_events]. The complete project proposal and documentation can be found here: |
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I had also considered opening up another issue for the following, but was unsure how to describe it, other than "rtmp streaming is a little messy" Here's the case (it's also documented in the doc above): Currently, RTMP Streaming works only if you correctly set the video preview queue to leaky (and it's the only other output), or if you set tune=zerolatency for x264enc. The options are configurable, but I don't know if there's a 'nicer' way to generalize this issue, maybe in core or something, or if we should just leave it as is. |
NOT YET TESTED. (this line will be removed from commit message when testing is complete) Implemented get_output_bin function in RTMP Streaming plugin. Returns a bin with video and audio sink pads, as necessary. Uses flvmux to mux the audio/video streams, and add metadata tags. Uses x264enc to encode the video to x-h264 for flv. Streams flv content to rtmp server at url provided by user. Testing notes: TODO Notes for review: - I add the metadata tags to the flv stream using the flvmux element. Currently, I'm not sure if that's the right way how to do it, and need to look into how to verify it. - I set the bitrate for the h264 encoder based on the value found in the ogg-output plugin.
- This is necessary to get around an issue where the if 2 output plugins are loaded at the same time, rtmp will freeze and not stream anything.
Audio encoding is done with faac (bad plugin), to follow youtube's encoding setting suggestions. As well, video bitrate and audio quality can be set by the user.
Added configureable setting to make the queue for the video preview plugin leaky. It is necessary to enable this when using rtmp streaming.
'tune' property is now configureable, used to set the property in x264enc (see http://mewiki.project357.com/wiki/X264_Settings). Also added a note about setting other outputs to be leaky when using rtmp. As well, added connecting signal to video quality spinbox that was missing
Corrected changes to rtmp streaming, so that changes made using the config widget take effect. Also, commented out audio encoding lines, until faac becomes available, or we decideo to use another encoder or element to adjust audio quality. (most of these need for fixes and the weird commit patterns were a result of me doing development on my local machine, and testing on my vm, and using git to transfer between the two. I have since decided that was a not-the-most-intelligent way of going about things.)
NOT YET TESTED. (this line will be removed from commit message when testing is complete) Implemented get_output_bin function in RTMP Streaming plugin. Returns a bin with video and audio sink pads, as necessary. Uses flvmux to mux the audio/video streams, and add metadata tags. Uses x264enc to encode the video to x-h264 for flv. Streams flv content to rtmp server at url provided by user. Testing notes: TODO Notes for review: - I add the metadata tags to the flv stream using the flvmux element. Currently, I'm not sure if that's the right way how to do it, and need to look into how to verify it. - I set the bitrate for the h264 encoder based on the value found in the ogg-output plugin.
- This is necessary to get around an issue where the if 2 output plugins are loaded at the same time, rtmp will freeze and not stream anything.
Audio encoding is done with faac (bad plugin), to follow youtube's encoding setting suggestions. As well, video bitrate and audio quality can be set by the user.
Added configureable setting to make the queue for the video preview plugin leaky. It is necessary to enable this when using rtmp streaming.
'tune' property is now configureable, used to set the property in x264enc (see http://mewiki.project357.com/wiki/X264_Settings). Also added a note about setting other outputs to be leaky when using rtmp. As well, added connecting signal to video quality spinbox that was missing
Corrected changes to rtmp streaming, so that changes made using the config widget take effect. Also, commented out audio encoding lines, until faac becomes available, or we decideo to use another encoder or element to adjust audio quality. (most of these need for fixes and the weird commit patterns were a result of me doing development on my local machine, and testing on my vm, and using git to transfer between the two. I have since decided that was a not-the-most-intelligent way of going about things.)
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Closing as duplicate. Continue any discussion in #439. |
Add ability to stream to a Youtube Live Event.
@mcchong and I will try to tackle this during this UCOSP term. We haven't come up with the details of the design yet.
For reference:
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