What is Transcoding?
Video Transcoding is the process of converting a video file from one format to another, to make videos viewable across different platforms and devices.
Please note that you must transcode any non-natively supported videos that you upload. Through this process, all transcoded files are set up with maximum compatibility over the system.
Impact of encoding VODs on my data usage
– Storage usage: The more renditions you create of your VODs, the more storage space is used in your Dacast account
– Transcoding credits: In February 2018, Dacast is going to implement transcoding limits that might have an impact on your usage of this service.
What does that mean? Dacast broadcasters will have a certain limit of transcoding limits per year. If this limit is passed, there will be the possibility to purchase extra transcoding credits.
How many GB of transcoding credits do I need?
Our in-house testing shows that a 45min/1 hour HD TV video requires 2 GB of transcoding credits.
How much will cost a GB of transcoding credits?
1 GB = $3 (min required: 2GB; Bulk purchases will be available)
Do I have to encode / transcode all the VODs uploaded to Dacast ?
No, we only recommend that you transcode the files that are non-natively supported.
Encoding settings supported
We recommend the following encoding settings:
- format: mp4
- video codec: h264
- audio codec: AAC
When using Dacast video transcoding services, these settings will be applied
First, begin to upload the content you want to use over Dacast. Please reference the Video on Demand Walkthrough or guide if you need help with this step. Once you select a file, you have the option to “Auto Encode” or “Raw Upload.”
If you choose “Auto Encode,” you don’t need to read the rest of this tutorial. Please note that there will be a delay in accessing content while you encode the content to the proper format.
When to Transcode with Raw Upload
We recommend that you do a raw upload in the following situations:
- When your native file already fits Dacast encoding requirements
- When you want to create several renditions of your VOD
After a raw upload, please go to the “Video On Demand” section of your account to see if the content is compatible.
If your files are not supported, they will show up with this red symbol and they will need to be transcoded.
Alternatively, your files may not play correctly if you did not encode them correctly. These will show up as a yellow symbol. In this case, please first test the video over Dacast to see if it plays correctly. Many times, it will.
If the content is fully supported, it should show a green symbol.
How to Transcode
First you will need to select that video and go to the tab. On this tab you can add additional bitrates to your file, and also transcode the “master”.
To do a file encoding, click on the button. This will take some time depending on file size, and will give a “Waiting” progress bar. You can leave the page while the progress bar is going and it’ll still finish at the same rate.
When completed, you will see a “YES” under the column “encoded”, next to the file you just encoded.
Alternatives to Transcoding
If you’d prefer not to transcode your content, there are programs that can transcode it for you. We recommend using a program called Handbrake, which is free to use.
What about live encoding?
Right now, Dacast does not support Dynamic Adaptive Live Stream Transcoding.
However Dacast does provide a fully adaptive player so you can set up a multi bitrates streaming directly in your encoder and the player will select the best quality based on the device and quality of the internet connection.