Unable to further increase buffer size for exoplayer after a certain point

[griffinfscribd]

I’m new to using exoplayer and am having some trouble increasing the buffer size.

Here is the scenario for what I’m trying to accomplish:
When I play audio in the exoplayer, the audio will be buffered and loaded. After the buffering finishes, I go from online to offline and I want to be able to play audio offline at an increased length hence why I want to increase the playback buffer size.

I have been able to increase this buffer duration by setting the loadControl on the exoplayer instance via setLoadControl and to that LoadControl, set the buffer duration using setBufferDurationMs and increase the values for minBufferMs and maxBufferMs.

Going well so far. The amount of audio played offline after buffering has increased. What has me stumped is that when I try to increase the value of minBufferMs, then play the audio offline after buffering, the length of the audio buffered seems to stay constant after a certain value of minBufferMs. For example, as I increase minBufferMs to 30 minutes or 2 hour equivalent of milliseconds, it never buffers more than 17 minutes of audio.

Let’s say I want to increase the amount of buffered audio to be played offline to 30 minutes, or even more. My issue is being able to do just that but there seems a fixed amount of audio buffered regardless of how high I increase the bufferMs for the loadControl. I am guessing it might be due to some limit to the buffer being set somewhere.

I’ve tried several other things - for LoadControl’s Builder setBufferDurationMs, I’ve experimented with reducing the bufferForPlaybackMs, bufferForPlaybackAfterRebufferMs to different values without any difference. I’ve tried changing the Allocator and setting the allocator to have a lower individualAllocationSize. I’ve tried bumping up the targetBufferBytes. Outside of the LoadControl, I tried playing around with the CacheDataSource in hopes that maybe it’d help by setting a cache with differing parameters.
I’ve tried playing around with the DefaultAudioSink and bumping up the PcmBufferDuration without much success.

I am hoping to get some guidance on where I should focus my attention further to achieve what I’m trying to do? I’ve tried fiddling with some settings but my worry is that I went through the right place mentioned above, but I didn’t understand it enough to put in the right values for the parameters and such.

[tonihei]

My guess is that the limitation comes from the memory limit in DefaultLoadControl. There is a time limit (controlled by minBufferMs and maxBuffersMs), which you already played around with. But there is also a memory limit that takes precedence by default. The default for audio-only is 12.8MB, which corresponds to about 100 kbit/s for 17 minutes of audio, matching your observation.

Could you try setting a higher limit with setTargetBufferBytes and/or instruct DefaultLoadControl to prefer the time limits of the memory limits (setPrioritizeTimeOverSizeThresholds(true))?

If that doesn't work, please let us know the exact configuration you tried and maybe also share a sample file you tested with so we can reproduce the issue.

[griffinfscribd]

Thank you @tonihei, I was able to resolve my issue and overcome the limitation with setTargetBufferBytes. Although I tried setTargetBufferBytes previously, my mistake was that it was not set to a high enough amount of bytes. Looking at setPrioritizeTimeOverSizeThresholds(true) helped me figure that out.

Closing issue since it's resolved.