Questions tagged [bitrate]

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1 answer
102 views

How to choose a bitrate when converting between formats?

I have a number of video files I need to convert to "regular" .mp4 format to view on my computer. The format they are in is not supported by my device (the driver has not been backported to ...
0 votes
1 answer
717 views

Which rate control algorithm best preserves quick movement?

I gathered the following rate control algorithms are commonly used when encoding modern video formats like h264, HEVC or VP9. With a constant quantizer (-qp in terms of ffmpeg) all frames are encoded ...
0 votes
1 answer
99 views

FFmpeg is encoding at a lower bitrate than what is specified

I'm fairly new to FFmpeg, I'm using this command: ffmpeg -i "C:\FFmpeg\Handbrake\Trackmania\Trackmania.mp4" -c:v libx264 -preset veryslow -b:v 10000 -fps_mode passthrough "C:\FFmpeg\...
1 vote
1 answer
233 views

Does it help to record at a higher bitrate and render at a lower one?

Currently, I record video games at 1080p 30 fps and 10,000 bitrate in OBS (MKV) but render vids after editing in DaVinci Resolve at 7,500. So I basically 'downscale' but with bitrate instead of ...
2 votes
1 answer
1k views

How to fix invalid bitrate with ffmpeg

I tried to download 3-hour long video (now unavailable) with YoutubeDL and ended up with a 2GB file of 14 seconds with the correct frame size but an insane bitrate: Input #0, mov,mp4,m4a,3gp,3g2,mj2, ...
0 votes
1 answer
516 views

Why does setting a maximum bitrate in Constrained Quality mode sometimes increase file size?

Short version: Why did my total file size increase when I switched from constant quality to constrained quality at the same crf? Shouldn't this just set a maximum bitrate and thus only either do ...
0 votes
1 answer
1k views

How to convert ProRes/Quicktime MOV to instagram-friendly with ffmpeg so I can post it on IG

My colleague made a really nice video to hype my record release. The file he exported is a 1.3GB MOV file, and appears to use the Apple ProRes codec in a quicktime container (I have no idea what this ...
3 votes
3 answers
6k views

Is there any ffmpeg command for knowing max bit rate of a video?

I have an MP4 file input.mp4 which is encoded in libx264. By ffprobe command: ffprobe -v error -show_streams input.mp4 I can know the bit rate of input.mp4, but it does not give the information of ...
0 votes
1 answer
39 views

Why does this script reduce the bitrate of both the video and the audio stream?

I wrote the following script that is meant to remove the unnecessary audio streams, aka dubbing, as well as subtitles from the movies in my collection: #!/usr/bin/bash echo "What is the path to ...
6 votes
4 answers
2k views

Is there a way to improve quality for videos with snow/confetti/LCD in background?

The effect I'm referring to: Essentially, the snow/confetti in the shot means lots of motion, hence a lot of the available bitrate is taken up by it, thereby ...
1 vote
2 answers
3k views

Recompressing 1080p h264 collection to HEVC - Target Bitrate For Minimal Loss

My understanding is that HEVC (aka h265) can provide roughly the same video quality as h264 in roughly half the space, for 1080p+ footage. I have a large collection that I would like to re-encode to ...
1 vote
2 answers
863 views

ffmpeg + libfdk_aac + vbr => wrong "BitRate_Mode"

I'm trying to encode sample video clip or audio track with ffmpeg and libfdk_aac with variable bitrate mode-vbr 3: ffmpeg -i sample.mp4 -crf 21 -vcodec h264 -acodec libfdk_aac -vbr 3 -ac 2 out.mp4 ...
0 votes
1 answer
592 views

ffmpeg produces the same output file with different bitrate settings

My input is an uncompressed video captured from old Hi8 cassettes, mediainfo: Format : RGB Codec ID : V_UNCOMPRESSED Codec ID/Info ...
2 votes
1 answer
2k views

"The sample rate of the two audio tracks is different"

I'm trying to merge a few video files through mkvmerge but I get the following error after running mkvmerge -o '/home/videos/marged/new.mp4' '/home/videos/intro.mp4' \+ 'old.mp4' \+ '/home/videos/...
4 votes
2 answers
4k views

Why I can't check the bit rate on some videos?

I've downloaded a video from YouTube, well I've downloaded the video stream and the audio stream of a YouTube video separately. Then with this ffmpeg command ffmpeg -protocol_whitelist "file,http,...
1 vote
1 answer
43 views

Magic Lantern or native specs in 2020

I am photographer and videographer and my main subject is product photography (antiques, watches, jewelry,...) and one of my biggest issue is poor sharpness and bad looking video from my Canon 77D. I ...
0 votes
1 answer
110 views

Am I increasing dynamic range by increasing the bit rate of video?

My smartphone allows me to change bit rate. Will I increase the dynamic range by doing that ? Thank you
0 votes
1 answer
58 views

50% higher bit rate vs 20% higher resolution

I have two videos: first one has 50% higher bit rate, second one has 20% higher resolution and slightly higher FPS. Which one will look better? I use a 1080p 72 inch 60 Hz screen at 10 feet distance. ...
1 vote
1 answer
221 views

Video with lower bitrate resulting from joining two video files

I had a 595mb .MP4 video (data rate: 510 kbps, Total bitrate 638 kbps). And I joined it with another .MP4 youtube video with a lower quality(only the end part).. The resulting video file has a data ...
0 votes
0 answers
203 views

No Maximum Bitrate H264 codec

I am trying to export a video with a low bitrate. Regardless of what I set as the target bitrate, the video always is exported with the highest possible bitrate. This occurs whether I use VBR or CBR. ...
1 vote
1 answer
334 views

Using youtube-dl: Does adaptive bitrate (ABR) affect image quality?

I'm using youtube-dl and ffmpeg to get videos/frames of videos from the web. I was told that youtube (and others) use adaptive bitrate streaming, so depending on the network conditions of the user the ...
2 votes
1 answer
2k views

Why is ffprobe showing another bitrate than the one I encoded with?

First I tested Jahzzar_-02-_FM.mp3: ffprobe Jahzzar_-_02_-_FM.mp3 and I found out that it was encoded with 224 kbps: Duration: 00:02:15.11, start: 0.025056, bitrate: 224 kb/s I encoded Jahzzar_-...
0 votes
1 answer
292 views

Why is the EOS M6 Video Bitrate lower than the EOS 1200D/T5?

I was looking to upgrade to the EOS M6 from the EOS 1200D/T5, but one thing that confused me was that the M6 has a listed video bitrate (at DPreview.com) at 1080p60 of 35 Mbps, and for lower ...
2 votes
2 answers
2k views

How to concatenate 2 MP4 videos to output of certain bitrate?

I've already read the other articles about concatenating but couldn't find any that discuss specifying the output bitrate. I have 2 MP4 videos. What I want to do is speed up the first video to 110% ...
3 votes
2 answers
53 views

If the environment being captured on a video stream becomes less complicated, does the bit rate and latency decrease?

For example, a live GoPro video is being streamed to a HDMI capture software on Windows. The live stream of an office with the lights on has a bitrate of X and a latency of Y ms. If the lights in the ...
0 votes
1 answer
52 views

Does bitrate also mean the internet speed I need to have?

I am streaming raw video at -r 30 and the bitrate is as follows frame= 228 fps=6.3 q=-1.0 Lsize= 410406kB time=00:00:31.03 bitrate=108341.2kbits/s Does that mean that I need 100Mb/s internet to ...
0 votes
1 answer
10k views

Which bitrate is needed for dvd quality?

As far as I know, cd quality for mp3s is at least 128 kbps. What should the video bitrate be to obtain dvd quality? Note I'm using mp4 container with mp3 audio and mpeg4 video.
1 vote
2 answers
2k views

ffmpeg live streaming to Periscope: bitrate appears too high

I just noticed Periscope Producer capability to accept live streaming from external sources. A quick test with ffmpeg fails to fit bitrate requirements of 160kbps max for audio. Periscope says my ...
6 votes
1 answer
10k views

It is better to have more B-frames or more P-frame for video streaming?

I'm trying to re-encode (H.264) some videos from my movie library in order to put them on a NAS and stream them to a smartTV through WiFi. In order to do so, I'm using HandBrake on MacOS and – among ...
1 vote
0 answers
743 views

HLS Preset Settings 240p, 360p, 480p, 720p and 1080p

I am trying to transcode mp4 videos into HLS using AWS transcoder. I see that there are only few presets available which are like 1M, 1.5M and the highest 2M. I am unable to get 240, 360 , 480,720p ...
1 vote
1 answer
300 views

Does increasing the framerate while not changing the content affects compression quality?

This question has no practical importance for a regular video production pipeline, but nonetheless it's something I find fascinating because it would imply video codecs use temporal sub-sampling ...
0 votes
1 answer
879 views

FFMPEG to convert img seq to DNxHD - BANDING

I am using FFMPEG in a VFX workflow to convert .png sequences to Avid friendly DNxHD. Today I ran into a situation where a video file I created had quite a bit of banding in Avid when it should not ...
1 vote
0 answers
257 views

Converting an AAC Mono file to AAC Stereo, higher audio bitrate?

I hope someone can help with this issue. A client is sending me videos recorded with iPhone; with dual-channel MONO AAC-LC audio, an average of 89 kbps. It's mono but dual-channel. I'm editing with ...
1 vote
1 answer
36 views

Suggestions/Ideas for a "Show Me" project for school about Audio or Video Encoding?

Basically, I need to make a quick "Show Me Something Cool" project for my physics class. It could be about anything sciency, that is cool, and that you can explain & demonstrate in class in like 5 ...
1 vote
1 answer
1k views

FFmpeg, encode video for 720p @ 4mbps playback

I've been fighting with this dilemma for about a week or two now and I've tried my best to understand it from whatever I can find through google. What I need (or at least I think I need) to do is ...
0 votes
1 answer
312 views

How do I insert the program requested bitrate from YouTube Recommended Uploading Encoding Settings?

I'm about to do some screen recording with OBS (Open Broadcaster Software) and I've just been checking the YouTube Recommended Upload Encoding Settings to get the best quality without overkilling the ...
0 votes
1 answer
50 views

Where can one find a current and definitive reference for video quality as it pertains to hosting HTML5 Videos?

At my job, I have encoded our sites videos for a couple years by using X-Media Re-encode: MP4 1024x576 VBR 1500kbps WebM 1024x576 CBR 1200kbps I never had complaints about quality or buffering, I ...
0 votes
1 answer
566 views

Adobe Premiere Bit Rate (Vimeo)

I just published a video on Vimeo and got this message: "This video’s bit rate is only 5568 kbit/s, which is lower than what we recommend for H.264 video. Your video might not look as nice as it ...
2 votes
1 answer
610 views

Bit rate reduction when converting 60fps footage into 30fps?

I'm shooting at 60fps, the result is video playing back normal speed but displaying 60fps. I then have stretched the clip so that i get 30fps playback speed with a slow motion clip twice as long as ...
0 votes
1 answer
112 views

Is there a mathematical equation to compute the bitrate of a Cisco H.264 stream?

I'm working on adaptive streaming for video. As I'm using a Cisco Open H.264 Encoder, I'm testing multiple configurations for the encoder. A configuration consists in a several of parameters (bps, fps,...
0 votes
1 answer
1k views

Exporting a video from Premiere spits out incorrect quality

I'm trying to export a video from Premiere(CC) with the following settings: I recorded this video in Motion-JPEG 1080p/60Fps out of Bandicam. I've recorded videos in Bandicam (same settings as ...
-1 votes
1 answer
610 views

Please explain video bit rate further

I don't understand this video on "What is bit rate" . I want it explained more. First I need you to define bit rate. And how compressing comes along it? What's that '...
3 votes
1 answer
2k views

how to measure bitrate of video over time

Given an encoded video file with non-constant bitrate, how would one analyze the bitrate over time? So far I found one old program that produces a bitrate plot, but none that can give the raw data of ...
2 votes
1 answer
81 views

Is there a way to get the bitrate of a specific region of a video?

I have some videos I recorded with my cell phone that I want to crop using Avisynth's crop(). I am using x264vfw with VirtualDub which asks for a target bitrate. I usually just get the bitrate from ...