![]() A specific decoder decodes at least one, but not necessarily all profiles. The H.264 standard can be viewed as a "family of standards" composed of a number of different profiles, although its "High profile" is by far the most commonly used format. An additional goal was to provide enough flexibility to allow the standard to be applied to a wide variety of applications on a wide variety of networks and systems, including low and high bit rates, low and high resolution video, broadcast, DVD storage, RTP/ IP packet networks, and ITU-T multimedia telephony systems. This was achieved with features such as a reduced-complexity integer discrete cosine transform (integer DCT), variable block-size segmentation, and multi-picture inter-picture prediction. The intent of the H.264/AVC project was to create a standard capable of providing good video quality at substantially lower bit rates than previous standards (i.e., half or less the bit rate of MPEG-2, H.263, or MPEG-4 Part 2), without increasing the complexity of design so much that it would be impractical or excessively expensive to implement. It supports a maximum resolution of 8K UHD. It is by far the most commonly used format for the recording, compression, and distribution of video content, used by 91% of video industry developers as of September 2019. H.261, H.262 (aka MPEG-2 Video), H.263, MPEG-1īlock diagram of video coding layer of H.264 encoder with perceptual quality scoreĪdvanced Video Coding ( AVC), also referred to as H.264 or MPEG-4 Part 10, is a video compression standard based on block-oriented, motion-compensated coding. Advanced Video Coding / H.264 / MPEG-4 Part 10 Advanced video coding for generic audiovisual services The audio is just passed through, as it is not worth reencoding just to change the sample rate imo, as you will lose quality."AVC1" redirects here. You could do a two pass encode if you want to target 442kb/s exactly, but I would recommend against it. Increase the value of crf if you overshoot 442kb/s, decrease the value if you want to increase visual quality. It upscales the video to 1080p and changes the frame rate to 29.970 fps (you may get stutter), the encoding settings will also be very close. It depends on what is most important to you in the final encode, and what your goals are.Ĥ42kb/s seems really low for a 1080p output in AVC, though it does depend on your source material. It's unlikely you will get those exact characteristics no matter what you do. Your destination characteristics seem to be close to the default settings for ffmpeg. The destination video must have (after to convert) the following characteristics:įormat profile : settings : CABAC / 3 Ref Framesįormat/Info : Advanced Audio Codec Low Complexityįormat profile : settings : CABAC / 4 Ref Frames I need to convert, using ffmpeg, a video. I am a newbie, i would be very greatfull if you can help me.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |