Always record in mp4

[Petro O. Bochan]

Howdy, currently, when doing tests with all sorts of SDKs, we have noticed that JS/iOS SDKs record video in mp4 format. However, Android SDK records in webm. Can make sure Android records in mp4 too?

We tried to strip codecs, when we strip vp8 - the video is recorded in flv. When we strip vp8 and flv - the video is still recorded in flv.

Thanks,
P

 

[Max]

Good day.
WCS supports the following recording containers (see Stream recording doc):

• MP4 for H.264 + AAC codecs
• WebM for VP8 + Vorbis codecs
• TS for H.264 + ADTS
• MKV (since WCS build 5.2.1190)

By default, the container is set automatically depending on codec published: MP4 for H264, webm for VP8. Seems like Android device you test does not support H264 codec on system level (this codec is implemented only in a certain applications like Chrome browser). So you should transcode stream on server from VP8 to H264

POST /rest-api/transcoder2/startup HTTP/1.1
HOST: localhost:8081
content-type: application/json
content-length: 242
 
{
    "uri": "transcoder2://tcode2",
    "localStreamName": "testH264",
    "remoteStreamName": "testVP8",
    "encoder": {
      "keyFrameInterval": 60,
      "fps": 30,
      "bitrate": 1000,
      "audioRate": 44100,
      "audioBitrate": 64000
      "audioCodec": "mpeg4-generic",
      "videoCodec": "H264"
    }
}

and then record it, but this requires a lot of server CPU and RAM.
Another option is stream recording file post processing by ffmpeg on the server, using on_record_hook.sh script: Record files handling script

 

[Petro O. Bochan]

Thanks for the answer - we will most likely go with post-processing using ffmpeg. With that - is there a way the "media" symlink can point to a folder outside wcs? We have tried doing

- vod-live://test.mp4 - works good with "media" symlink pointing to /usr/local/FlashphonerWebCallServer/records/ and file residing in records/test.mp4
- vod-live://my/test.mp4 - works good with "media" symlink pointing to /usr/local/FlashphonerWebCallServer/records/ and file residing in records/my/test.mp4

However, when we point the "media" symlink to, for example /home/username/streams/ - nothing seems to be working.

 

[Max]

Please use media_dir parameter instead of symlink:

media_dir=/opt/media

Also please make sure that flashphoner user has enough privileges to the media folder

sudo chmod o+rw /opt/media

Another option is to launch WCS as root. In latest builds, change the following parameter in /usr/local/FlashphonerWebCallServer/bin/setenv.sh

WCS_NON_ROOT=true

to

WCS_NON_ROOT=false

 

[Petro O. Bochan]

Many thanks - it worked. I'm not a pro in Linux, but only the following setup worked:
1. media_dir = /opt/folder
2. sudo chmod o+rw /opt/folder
3. WCS_NON_ROOT=false
If I excluded any of the following steps - WCS won't even start.

 

[Max]

Please update WCS to the latest build 5.2.1219 and check again. If the issue still reproducing, try to fix the permissions with command

sudo /usr/local/FlashphonerWebCallServer/bin/webcallserver set-permissions

and restart WCS.