Any tips do make file size smaller?
- Thread starter frellzy
- Start date
DayGeckoArt
Member
Stay with CQP and increase the CQ level. 25 still gets good quality, 30 is decent and much smaller
Also don't use multipass. Increase your preset to a higher quality option
Also don't use multipass. Increase your preset to a higher quality option
sandrix
Member
Perhaps someone will read this post. I will take the time to try to explain that CQP is not always good. Sorry for my English
Everyone recommends using CQP, but no one fully understands how this mode works. With CQP, the bitrate is allocated as much as to match the given quality (QP - quantization parameter). In simple terms, QP defines quality. CQP (Constant Quantization Parameter) means constant quality. Therefore, when using CQP, the video bitrate can range from tens of kilobits per second to hundreds of megabits. The main disadvantage of CQP is that in those fragments of the video, when the quality could reach its maximum value, this will not happen, because it is strictly limited by QP. That is, you tell the encoder, I want this quality, no more, no less, and allow him to allocate as much bitrate to get it.
As a result, you usually do not achieve the maximum quality, for this you need to specify lower QP values (16 or less). You will also get huge files, especially when it is a dynamic video. Therefore, CQP is suitable for recording high quality video, when the bitrate does not matter, but only the quality of the video matters! CRF is even better, but I will not complicate.
With CBR/VBR, the bitrate determines the quality. QP can vary from 1 to 51 units. That is, the quality dynamically changes depending on the set bitrate. The problem with these bitrate control modes is that the minimum quality is limited by the given bitrate. As a result, in those fragments of the video, when it would be worth specifying more bitrate, this will not happen, because. bitrate is strictly limited. The encoder will have to compress the video, degrading the quality, in order to keep within the specified bitrate. However, these modes are more rational in terms of quality and file size. In simple words, depending on the set bitrate, you limit the minimum quality, but not the maximum. With CQP, both the minimum and maximum are limited. CBR/VBR are ideal for video storage and processing as the target bitrate is known and the file size can be predicted.
I apologize if something is not clear, because this is a rather large and complex topic. In this forum, I constantly see how everyone is indiscriminately advised to use CQP, and everything else is rejected.
Everyone recommends using CQP, but no one fully understands how this mode works. With CQP, the bitrate is allocated as much as to match the given quality (QP - quantization parameter). In simple terms, QP defines quality. CQP (Constant Quantization Parameter) means constant quality. Therefore, when using CQP, the video bitrate can range from tens of kilobits per second to hundreds of megabits. The main disadvantage of CQP is that in those fragments of the video, when the quality could reach its maximum value, this will not happen, because it is strictly limited by QP. That is, you tell the encoder, I want this quality, no more, no less, and allow him to allocate as much bitrate to get it.
As a result, you usually do not achieve the maximum quality, for this you need to specify lower QP values (16 or less). You will also get huge files, especially when it is a dynamic video. Therefore, CQP is suitable for recording high quality video, when the bitrate does not matter, but only the quality of the video matters! CRF is even better, but I will not complicate.
With CBR/VBR, the bitrate determines the quality. QP can vary from 1 to 51 units. That is, the quality dynamically changes depending on the set bitrate. The problem with these bitrate control modes is that the minimum quality is limited by the given bitrate. As a result, in those fragments of the video, when it would be worth specifying more bitrate, this will not happen, because. bitrate is strictly limited. The encoder will have to compress the video, degrading the quality, in order to keep within the specified bitrate. However, these modes are more rational in terms of quality and file size. In simple words, depending on the set bitrate, you limit the minimum quality, but not the maximum. With CQP, both the minimum and maximum are limited. CBR/VBR are ideal for video storage and processing as the target bitrate is known and the file size can be predicted.
I apologize if something is not clear, because this is a rather large and complex topic. In this forum, I constantly see how everyone is indiscriminately advised to use CQP, and everything else is rejected.