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- MP4 for H.264 + AAC codecs
- WebM for VP8 + Vorbis codecs
- TS for H.264 + ADTS
Quick manual on testing
Stream recording
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turns on recording for the streams captured from RTSP IP cameras.
Forming the name of the stream record file
By default, the file name is formed by template specified with stream_record_policy_template parameter:
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Recording to MPEG-TS container
By default, H264 streams are recorded to MP4 container and VP8 streams to WebM. Since build 5.2.610, H264 streams can also be recorded to TS container using the following parameter
| Code Block | ||
|---|---|---|
| ||
streamrecord_recordh264_policyto_template=stream-{mediaSessionId}-{login} |
The following elements can be used in template:
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ts=true |
Known limits
1. VLC before 3.0.8 can not play TS recordings.
2. TS recordings can not be rewound while playing in VLC.
Forming the name of the stream record file
By default, the file name is formed by template specified with stream_record_policy_template parameter:
| Code Block | ||||
|---|---|---|---|---|
| ||||
stream_record_policy_template=stream-{mediaSessionId}-{login} |
The following elements can be used in template:
| Element | Description | Maximum size |
|---|---|---|
| {streamName} | Stream name | |
| {duration} | File duration, for MP4 recordings only | |
| {startTime} | Recording start time | 20 characters |
| {endTime} | Recording end time | 20 characters |
| {sessionId} | Session ID in BASE64 encoding | 60 characters |
| {mediaSessionId} | Media session ID | 36 characters |
| {login} | Login | 32 characters |
| {audioCodec} | Audiocodec | 4 characters |
| {videoCodec} | Videocodec | 4 characters |
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Audio track bitrate configuration for FDK AAC codec
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codec
Since 5.2.428, the ability is added to set audio track bitrate mode for recording with FDK AAC codec. By default, mode 5 is set (VBR 112 kbps). This value can be changed with the following parameter
| Code Block | ||
|---|---|---|
| ||
record_fdk_aac_bitrate_mode=5 |
The following bitrate modes are possible:
- 0 - CBR
- 1-5 - VBR
Note that recording files playback by file timestamps using nginx module ngx_http_mp4_module is possible for VBR recordings only.
Audio channels configuration
Since build 5.2.610 it is possible to set audio channels count for recordings using the following parameter
| Code Block | ||
|---|---|---|
| ||
record_audio_codec_channels=2 |
By default, audio channels count set to 2 (stereo). To record stream with monophonic audio, the following should be set
| Code Block | ||
|---|---|---|
| ||
record_fdkaudio_aaccodec_bitrate_mode=5 |
The following bitrate modes are possible:
- 0 - CBR
- 1-5 - VBR
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channels=1 |
Client side
If stream recording is enabled on the server, whether the stream is recorded or not is determined by the value of record parameter passed into the createStream function in the script of the publisher client:
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