dee_84 Posted October 24, 2012 Share Posted October 24, 2012 Hi, We're currently in tech for a show and we're having problems playing the audio on some of the video files the designer has sent us. We're using an Arkaos MediaMaster (windows based), the video files are mpeg4. Some of the files play fine (also mpeg4), but 3 of them aren't. Interestingly, one of the files plays the last few seconds of audio, but the rest of the track is lost. All of the files play fine on the mac we downloaded them on to for transfer to the server. We've requested new files from the designer a second time, as we think it's a problem with the way the sound has been added to the files, rather than an issue with the server. Has anybody else had this kind of issue before, and how did they go about fixing it? Link to comment Share on other sites More sharing options...
Olie Posted October 24, 2012 Share Posted October 24, 2012 This is an issue I have come across before so maybe this can be of help. In the circumstances where I have seen this it is because an initial version of the Microsoft MPEG4 Decoder simply could not play the audio. Unfortunately though it took presidency over all other codecs installed on the system. The way I resolved this was to select which codec you used in the software. If you select something like MainConcept or any other decoder apart from the Microsoft one it should play fine. Not sure though whether you can select the decoder in Arkaos. I would suggest running updates on your system as Microsoft have fixed this bug. Your solution to re-encode the video using a different audio compression should work too. Link to comment Share on other sites More sharing options...
indyld Posted October 25, 2012 Share Posted October 25, 2012 I've seen this in Qlab too (Mac, natch), even when the video and audio will both play OK in Quicktime. Without too much investigation into precisely what the exact codec issue is, re-encoding the MP4 using something like Handbrake usually sorts it out. Link to comment Share on other sites More sharing options...
dee_84 Posted October 25, 2012 Author Share Posted October 25, 2012 Thanks Guys, I've been trying to create new files with Garageband (iMovie won't let me export for some reason), but it's not made any difference. I'll give HandBreak a go, hopefully it'll work. :) Link to comment Share on other sites More sharing options...
Stuart91 Posted October 25, 2012 Share Posted October 25, 2012 Here is the link to download Handbrake, for anyone else who's looking. I can highly recommend it myself - it is one of these programs that you could keep on your laptop the same way you keep a Leatherman on your belt. And it's free, too. Link to comment Share on other sites More sharing options...
dee_84 Posted October 25, 2012 Author Share Posted October 25, 2012 Sadly HandBreak hasn't helped here, although it was very nice and easy to use. It seems that the problem we have is playing the audio which has been recorded by the camera. The files play fine on a PC and a mac, but not through the media server. Link to comment Share on other sites More sharing options...
dee_84 Posted October 26, 2012 Author Share Posted October 26, 2012 Hello again! For those who are interested, the problem was an external sound card. We're not sure if the card itself was dodgy, or if it was because the audio was being sent over USB and therefore being further compressed. We've now sorted the problem, thanks you to everybody who tried to help! Dee Link to comment Share on other sites More sharing options...
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