Possible WebM Improvements
Aug 24, 2015
Archive Agent wrote
Currently there are two issues with the WebM format:
1. Using VideoCapture SDK, the capture will occasionally lock or freeze on a frame. Sometimes it recovers after perhaps 10 seconds, sometimes it does not. This is repeatable capturing from any webcam at low resolution and bitrate (ie. 640x360, 25fps, 1000 bit rate). Is it possible for improvement through DirectShow graph handling? Or is this a problem with the Xiph codec package?
2. Seeking. WebM does not seek well, if at all, using MediaPlayer SDK. This is repeatable with ffmpeg or dshow playback. Would it be possible to capture more keyframes to help with seeking when using the VideoCapture SDK? What about updating the ffmpeg build for ffmpeg playback? See the commit below:
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=7c00d853a65884870e2a7a916197d87c125ed630
Thanks for any ideas and help.
Cheers
dsiebes on June 10, 2013 18:41
1. Using VideoCapture SDK, the capture will occasionally lock or freeze on a frame. Sometimes it recovers after perhaps 10 seconds, sometimes it does not. This is repeatable capturing from any webcam at low resolution and bitrate (ie. 640x360, 25fps, 1000 bit rate). Is it possible for improvement through DirectShow graph handling? Or is this a problem with the Xiph codec package?
2. Seeking. WebM does not seek well, if at all, using MediaPlayer SDK. This is repeatable with ffmpeg or dshow playback. Would it be possible to capture more keyframes to help with seeking when using the VideoCapture SDK? What about updating the ffmpeg build for ffmpeg playback? See the commit below:
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=7c00d853a65884870e2a7a916197d87c125ed630
Thanks for any ideas and help.
Cheers
dsiebes on June 10, 2013 18:41
Completed
0
Vote
Reply
3 Answers
Aug 24, 2015
Archive Agent
agent
wrote
Roman Minyaylov
1. Xiph
2. Yes, we're working on FFMPEG build update. VP8 interface do not allow to add more keyframes to seek better.
on June 10, 2013 18:44
1. Xiph
2. Yes, we're working on FFMPEG build update. VP8 interface do not allow to add more keyframes to seek better.
on June 10, 2013 18:44
Aug 24, 2015
Archive Agent
agent
wrote
Warren
Can you stream the webm format live such as from a webcam out to a live stream? I would like to play back the live stream on a chrome supported browser that supports webm.
on August 20, 2013 18:18
Can you stream the webm format live such as from a webcam out to a live stream? I would like to play back the live stream on a chrome supported browser that supports webm.
on August 20, 2013 18:18
Aug 24, 2015
Archive Agent
agent
wrote
Roman Minyaylov
Sounds interesting, checking it now.
on August 20, 2013 18:27
Sounds interesting, checking it now.
on August 20, 2013 18:27