[Android Apps and Games] gehrehmee:
Bubbleserver Chromecast Transcoding not happening?

I've set up bubbleserver on my fedora linux box, configured firewall rules appropriately, verified the status tab shows connectivity working right, and then:

- Selecting my (1st gen) chromecast as a renderer

- Selected my linux box's dlna server (with bubble server's proxy) as the media source

- Verified that Chromecast Transcoding is enabled on the server (gpu transcoding is disabled -- I'll leave that as a later exercise, as I don't need it just yet)

- Selected an MKV file to play

Observed just a black screen. Bubbleserver's log reports:

[qtp1573751930-76 (76) ] INFO - 0:05:43.649 - ChromecastTranscodeServlet : input URL: http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[qtp1573751930-76 (76) ] INFO - 0:05:43.649 - ChromecastTranscodeServlet : GPU transcoding is disabled by server configuration
[qtp1573751930-76 (76) ] INFO - 0:05:43.650 - FFMpegUtils : using cached probe info for http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv_mkv
[qtp1573751930-76 (76) ] INFO - 0:05:43.650 - ChromecastTranscodeServlet : input format: matroska,webm
[qtp1573751930-76 (76) ] INFO - 0:05:43.650 - ChromecastTranscodeServlet : video extension: mkv
[qtp1573751930-76 (76) ] INFO - 0:05:43.651 - ChromecastTranscodeServlet : video: 720x576, 2524.597s, 25.000 fps, 1137 kbps, h264 (Main@51), yuv420p, 2524.597000s
[qtp1573751930-76 (76) ] INFO - 0:05:43.651 - ChromecastTranscodeServlet : video audio: vorbis, channels: 2
[qtp1573751930-76 (76) ] INFO - 0:05:43.652 - ChromecastTranscodeServlet : redirecting to http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[qtp1573751930-153 (153) ] INFO - 0:05:43.652 - ChromecastTranscodeServlet : input URL: http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[qtp1573751930-153 (153) ] INFO - 0:05:43.652 - FFMpegUtils : using cached probe info for http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv_mkv
[qtp1573751930-153 (153) ] INFO - 0:05:43.653 - ChromecastTranscodeServlet : input format: matroska,webm
[qtp1573751930-153 (153) ] INFO - 0:05:43.653 - ChromecastTranscodeServlet : video extension: mkv
[qtp1573751930-153 (153) ] INFO - 0:05:43.653 - ChromecastTranscodeServlet : video: 720x576, 2524.597s, 25.000 fps, 1137 kbps, h264 (Main@51), yuv420p, 2524.597000s
[qtp1573751930-153 (153) ] INFO - 0:05:43.654 - ChromecastTranscodeServlet : video audio: vorbis, channels: 2
[qtp1573751930-153 (153) ] INFO - 0:05:43.654 - ChromecastTranscodeServlet : redirecting to http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[qtp1573751930-76 (76) ] INFO - 0:05:43.670 - r : proxy stream request /stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv => http://192.168.100.24:8200/MediaItems/37.mkv
[qtp1573751930-153 (153) ] INFO - 0:05:43.738 - FFMpegUtils : using cached probe info for http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv_mkv
[qtp1573751930-163 (163) ] INFO - 0:05:43.761 - r : proxy stream request /stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv => http://192.168.100.24:8200/MediaItems/37.mkv
[com.bubblesoft.bubbleupnpser] INFO - 0:05:43.790 - o$b : proxy: onResponseComplete: total response bytes: 28146
[com.bubblesoft.bubbleupnpser] WARNING - 0:05:43.800 - o$b : proxy: onResponseContent: org.eclipse.jetty.d.o
[qtp1573751930-150 (150) ] INFO - 0:05:43.902 - r : proxy stream request /stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv => http://192.168.100.24:8200/MediaItems/37.mkv
[qtp1573751930-153 (153) ] INFO - 0:05:44.434 - ChromecastTranscodeServlet : input URL: http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[qtp1573751930-153 (153) ] INFO - 0:05:44.434 - FFMpegUtils : using cached probe info for http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv_mkv
[qtp1573751930-153 (153) ] INFO - 0:05:44.434 - ChromecastTranscodeServlet : input format: matroska,webm
[qtp1573751930-153 (153) ] INFO - 0:05:44.435 - ChromecastTranscodeServlet : video extension: mkv
[qtp1573751930-153 (153) ] INFO - 0:05:44.435 - ChromecastTranscodeServlet : video: 720x576, 2524.597s, 25.000 fps, 1137 kbps, h264 (Main@51), yuv420p, 2524.597000s
[qtp1573751930-153 (153) ] INFO - 0:05:44.435 - ChromecastTranscodeServlet : video audio: vorbis, channels: 2
[qtp1573751930-153 (153) ] INFO - 0:05:44.435 - ChromecastTranscodeServlet : redirecting to http://192.168.100.24:58050/stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv
[com.bubblesoft.bubbleupnpser] WARNING - 0:05:44.535 - o$b : proxy: onResponseContent: org.eclipse.jetty.d.o
[qtp1573751930-76 (76) ] INFO - 0:05:48.804 - r : proxy stream request /stream/video/21eae7cf6ceb3e71ecba6ab92be735ef.mkv => http://192.168.100.24:8200/MediaItems/37.mkv

Playing plain old MP4 works (and always has), but attempting to play content that should require transcoding seems very much as if it's not attempting to transcode at all (if I'm reading the logs right).

Any suggestions? Thanks.