Search Discussions:
Showing results for 
Search instead for 
Do you mean 
Advanced Search...
Welcome to Nokia Support Discussions! Here you can share advice and tips with thousands of other Nokia users around the world in English. Many Nokia employees also follow and participate in the discussions, see our guidelines for more information. Everyone can search and read the discussions, but to post your own question or reply to others, simply sign in with your Nokia account. If this is your first time here, you can choose an alias to represent you. And if you don't have a Nokia account yet, please register.
Reply

Re: Video play issue

Counsellor
claudio_b_p
Posts: 89
Accepted Solution

Video play issue

Hello.

When watching avi and mkv when I select to play another part of the movie the sound does not come back. I only get the video with no sound.

The files are large from 700 MB to 4500 MB.

Sometimes the sound comes several seconds (sometimes aprox. 10).

Some files I get points of the movie that the video pauses itself. I have to fast forward a few seconds to get the movie to continue playing.

I have a Nokia E7 with Belle.

¿Are this issues normal to Belle or are caused by a bad update from Anna?

Greetings from Paraguay.
Claudio Bogado Pompa.
Please use plain text.
Ex-Moderator (Retired)
Raoul_Duke
Posts: 3,173

Re: Video play issue

[ Edited ]

Hi claudio_b_p,

Thanks for you post.

I don't think issue is caused by firmware of the device but rather how the file has been encoded, the profile level the file is using and the codec itself as this issue happens to me also using several different devices including non Nokia handsets and even dedicated media players and even on my P.C as well. Sometimes if you leave it say 10 to 20 seconds the sounds eventually catches up.

I've never really worked out what the issue is as it doesn't happen with all MKV files but some but I suspect it has something do to with hardware, software decoding and the way the MKV file itself has been encoded. The MKV file is just a container (For more reading about MKV please refer to this link http://www.matroska.org/index.html) which holds the video stream. The majority of video streams in an MKV is H.264. These are then encoded according to certain encoding level profiles. Profiles define the sets of bit stream features the h.264 stream can use. Levels define restrictions on the video resolution, frame rate and VBV (Video Buffer Verifier) etc. In short, Level 5.1 uses four to five times the bandwidth of Level 4.1 and hence allows very high definition video, 4096×2304 at 25 or similar. So you could have an MKV but the profile level could be so high that the hardware just doesn't support it even though it supports MKV. Most spec sheets of devices do state what profile level MKV's support. For a non dedicated media player such as a mobile device it is not recommended to go above 4.1.

 

For more reading into the H.264 codec please refer to this link:

 

http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC


I personally don't believe it has anything to do with Anna or Belle but hardware limitations and the way the MKV file has been encoded. Best thing to do is to check the MKV file that you are using. To find out the profile level of a file you will need to use a media tool as you can't simply check it by looking into the property of the file. A good tool to check media file information is Mediainfo which is a free application.

 

Try a variety of video files such as mp4, avi, xvids etc and see if you experience the same issues.

 

Hope this helps.

 

Regards

 

Raoul_Duke

If you find this post helpful, a click upon the white star at bottom would always be appreciated.
If it also solves your problem, clicking ACCEPT AS SOLUTION below it will benefit other users!
Please use plain text.