NWW 5 Posted June 5, 2015 Posted June 5, 2015 Hi all! Just got a Chromecast and started playing a bit with it. I am wondering Emby uses WebM when the content is already H264/AC3 Inside an .mkv? Wouldn't a container swap to .mp4 be better? Thanks!
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 Then I must be doing something wrong! What forum should I post my logs in?
Luke 42077 Posted June 5, 2015 Posted June 5, 2015 here is fine. if you need help see http://emby.media/community/index.php?/topic/790-how-to-report-a-problem/
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 All right, here's what I've been doing: Using an Ipad with the iPhone application (the old one, the free one) I start remote playback on the Chromecast. Everything is on the same network. On the server (i5-2500k@4.2Ghz), ffmpg starts up to 100% then stabilizes at 25 with some bursts. Here are the logs! transcode-40b21581-4b1e-4459-b923-8aea69795aa0.txt server-63569080792.txt
Luke 42077 Posted June 5, 2015 Posted June 5, 2015 Ok, for the iphone, we are soon releasing a new app that will use our new Chromecast receiver. There will be no webm. Stay tuned for that as it's almost ready.
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 Awesome! In the meantime, what can I use to have HLS on the chromecast?
Luke 42077 Posted June 5, 2015 Posted June 5, 2015 android. the web client with chrome. you can also contact the developer of your existing apple app for help or improvement.
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 Thanks! Will try with the web client, don't have an Android device in home. Cheers!
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 Sorry for double post. Just tested with the Chrome Web Client and indeed it works! I went ahead and tried another H264/AC3, but it transcoded both audio (from 5.1 down to stereo) and video. Here are the logs. Any reason for that? Or am I doing something wrong? transcode-4a2de9f8-ccfb-4752-9a2f-ea2db9f70100.txt
Luke 42077 Posted June 5, 2015 Posted June 5, 2015 You're not doing anything wrong. The will convert to formats the clients understands. I would just enjoy your videos.
NWW 5 Posted June 5, 2015 Author Posted June 5, 2015 I would prefer to not transcode if I can avoid it. According to Google's guideline's (and other posts on this forum) H264/AC3 shouldn't transcode.
NWW 5 Posted June 7, 2015 Author Posted June 7, 2015 I've been doing some tests. I've converted an H264/AC3 .mkv file to a 1:1 copy H264/AC3 .mp4 file using this command ffmpeg -i input.mkv -c:v copy -c:a copy output.mp4 The resulting file has been placed in lieu of the original file in the file structure. A refresh of the database has been done. Playing that file from the Chrome browser (on a desktop) to the Chromecast will do the following: 1: transcoding the H264 to H264 using libvx264 at ORIGINAL QUALITY (?!?) but with 100% CPU usage !!! 2: downgrading the 5.1 AC3 to a stereo AAC This results in a lower quality video and audio. This shouldn't be the case as the Chromecast supports H264/AC3 natively, as per this forum and Google's dev guidelines. I have searched every inch of the Dashboard for a setting, nothing is appearing as relevant to the Chromecast. In user profile, Chromecast bitrate has been set to 12 mbps, streaming to 20 mbps. So Luke, sorry but I can't "enjoy" my videos like that, the geek in me is going nuts over the unnessecary CPU usage. I am somehow sure that I have done something wrong to mess with Chromecast streaming but I can't find a reason why. transcode-62dbbb43-b893-460f-b0ef-dc7317d38020.txt
Luke 42077 Posted June 7, 2015 Posted June 7, 2015 you can always review the server log in debug mode to find the reason it is transcoding
NWW 5 Posted June 7, 2015 Author Posted June 7, 2015 (edited) 2015-06-07 16:51:35.2637 Info - App: C:\Users\****\AppData\Roaming\MediaBrowser-Server\ffmpeg\20150331\ffmpeg.exe -loglevel debug -i file:"D:\Videos\TV Shows\Arrow\Season 3\Arrow - S03E23 - My Name Is Oliver Queen.mp4" -map_metadata -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 libx264 -pix_fmt yuv420p -preset superfast -crf 23 -maxrate 5075930 -bufsize 10151860 -vsync vfr -profile:v high -level 50 -force_key_frames expr:gte(t,n_forced*3) -vf "scale=trunc(min(max(iw\,ih*dar)\,min(1920\,1080*dar))/2)*2:trunc(min(max(iw/dar\,ih)\,min(1920/dar\,1080))/2)*2" -flags +loop-global_header -sc_threshold 0 -copyts -codec:a:0 aac -strict experimental -ac 2 -ab 128000 -af "adelay=1,aresample=async=1,volume=1" -hls_time 3 -start_number 0 -hls_list_size 0 -y "C:\Users\****\AppData\Roaming\MediaBrowser-Server\transcoding-temp\680a4ed6408331a882877c5de4d80a34.m3u8" 2015-06-07 16:51:35.8177 Error - NotFoundHttpHandler: 192.168.1.100:8096 Request not found: /favicon.ico 2015-06-07 16:51:36.3857 Info - App: returning C:\Users\****\AppData\Roaming\MediaBrowser-Server\transcoding-temp\680a4ed6408331a882877c5de4d80a340.ts That's the server log when I start the .mp4. I'll look at the transcode log. EDIT: The transcode log looks like the one I posted above, I already had dev logging in the transcoding section enabled. Edited June 7, 2015 by NWW
NWW 5 Posted June 7, 2015 Author Posted June 7, 2015 (edited) Okay, I'm posting it here and I'm going though it as well. EDIT: found this: 2015-06-07 17:02:53.9268 Debug - App: Starting transcoding because currentTranscodingIndex=null server-63569293326.txt Edited June 7, 2015 by NWW
Luke 42077 Posted June 7, 2015 Posted June 7, 2015 Right. the only reason we have not yet added ac3 to chromecast direct streaming is because we can't assume the user's audio equipment will support it. chromecast supports ac3 passthrough but not ac3 decoding. when we originally enabled passthrough for everyone, we received a lot of reports of video playing without sound. so it is just waiting until an option is added for the user to specify.
NWW 5 Posted June 7, 2015 Author Posted June 7, 2015 Okay, that's for the audio Does the fact that it transcodes the audio also triggers the video transcode? Because on WP, it doesn't
Luke 42077 Posted June 7, 2015 Posted June 7, 2015 We'll add a passthrough setting for ac3 on chromecast soon.
NWW 5 Posted June 9, 2015 Author Posted June 9, 2015 Just want to report that using the latest dev build, direct play works on an .mkv with H264/AC3 on the Chromecast! Cheers!
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