What is Video Transcoding?

In this article, we will cover the entire process of transcoding videos, from its definition to how to transcode your video.

Video transcoding is the process of transforming video from one format to another without losing its quality

Video Transcoding is performed using software like FFmpeg, HandBrake, VLC, Media Player, and XMedia Recode. It can also be done with hardware encoders or cloud-based services like Amazon Elastic Transcoder, Google Cloud Video Intelligence API, and Microsoft Azure.

Which processor does video transcoding CPU or GPU?

In general, the selection of a CPU for video transcoding will depend on a number of variables, including the application’s unique needs, the number of video streams being processed, and the hardware budget that is available.

Different processors, such as CPUs (Central Processing Units), GPUs (Graphics Processing Units), and specialized hardware like ASICs (Application-Specific Integrated Circuits) and FPGAs (Field-Programmable Gate Arrays), are capable of transcoding video.

How to transcode a video?

In this process, video files are extracted from their original formats during transcoding before being re-encoded with new codecs, bitrates, resolutions, and other parameters that correspond to the target devices or platform.

Other procedures like scaling, cropping, deinterlacing, or color correction could also be a part of the process.

How the video transcoding works?

Video transcoding is a combination of seven steps as listed below:

  1. Analysis of the Source File

    In this step, the format, resolution, frame rate, bitrate, and other details of the video file are investigated. This knowledge is required in order to select the best transcoding parameters.

  2. Decoding

    With the help of a codec compatible with the source file, the video file is converted from its original format.

  3. Video Processing

    The video may be altered to improve it or get it ready for transcoding. This category may include processes like scaling, cropping, deinterlacing, color correction, or noise reduction.

  4. Encoding

    The video is re-encoded in a new format using a codec that is most suitable for the target platform and device. This can require changing the resolution, bitrate, frame rate, and other specifications depending on the requirements of the target format.

  5. Audio Encoding

    If the has audio in the original video file, it is re-encoded as well in the new format. It could be necessary to adjust the audio codec, bitrate, or channel settings.

  6. Quality Control

    The transcoded video is checked for errors and compatibility issues, such as artifacts, glitches, and issues with the aspect ratio or audio synchronization. If issues are discovered, the transcoding process may be redone with other settings.

  7. Output

    In this final step, the transcoded video is converted into a new file with the format, resolution, and other settings that were selected. The revised file can now be played, distributed, or subjected to further processing.

The specific steps and characteristics involved in video transcoding may alter depending on the source file, the target format, the transcoding program or service utilized, and other factors. The final objective is a high-quality, platform- and device-compatible, and optimized video file that can be viewed on numerous devices and platforms.

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