Previously, we predicted whether the subtitle should be burned in with transcode reasons, but that was not accurate because the actual transcoding codec is only determined after the client has requested the stream. This pass through the option to the `DynamicHlsController` to handle the subtitle burn-in during the actual transcoding process. Now the client should be responsible to conditionally load the subtitle when this option is enabled.
Using the first profile's reason is somewhat arbitrary, as many clients' first profile may not be the most compatible one. For instance, browsers often set WebM as the first profile, which doesn’t support common codecs like H.264 and AAC by design. This causes `VideoCodecNotSupported` and `AudioCodecNotSupported` to be returned, even if the browser supports those codecs. Only use those reasons when all profiles indicate that the codec is not supported.
Signed-off-by: gnattu <gnattuoc@me.com>
Currently, when specifying codec profiles, the client can only specify profiles applied to direct containers, with no way to apply a profile specifically to HLS or a specific HLS container. This limitation is not suitable for more complex client codec support scenarios.
To address this, a SubContainer field is added to CodecProfile. The client can now specify the main container as "hls" to apply the profile exclusively to HLS streams. Additionally, the SubContainer field allows the profile to be applied to a specific HLS container.
Currently, this is only used in StreamBuilder for HLS streams. Further changes may be required to extend its usage.
Signed-off-by: gnattu <gnattuoc@me.com>
* Check MaxAudioChannels for directAudioStream candidates
The current stream builder logic does not check the channel limit when determining if the audio stream can be directly used, and this can cause some undesired effects:
- A high channel count surround sound stream might be picked even if a stereo one exists when the user requires stereo audio.
- The user's preferred audio codec might not be respected during the downmix because the requested codec is now forced to be the same as the original source.
Signed-off-by: gnattu <gnattuoc@me.com>
* Fix unit test
Signed-off-by: gnattu <gnattuoc@me.com>
* Set correct transcode reason and target channels for unit test
Signed-off-by: gnattu <gnattuoc@me.com>
* Match old stream selection behavior
Signed-off-by: gnattu <gnattuoc@me.com>
* Fix reason matching
Signed-off-by: gnattu <gnattuoc@me.com>
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Signed-off-by: gnattu <gnattuoc@me.com>
Add VP9 as a valid HLS format to enable remuxing. This is useful when audio processing is required, but the VP9 video can be passed as-is to avoid unnecessary video transcoding.
No VP9 encoder is enabled and should not be enabled. AV1 and HEVC should be preferred over VP9 if video transcoding is required.
Signed-off-by: gnattu <gnattuoc@me.com>
