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Questions tagged [h.264]

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newbie video 4k using H.264

Hope this is a proper site for this question,apologies if not. First time using Akaso V50 Pro action cam . Shot video of wedding. Camera came with 4K/30fps and Codec H.264 selected. Nothing in manual ...
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1answer
25 views

Video cam with poor compression ratio (H.264 produces videos at 2.9MB/sec)

I just purchased a cheap dashboard video-camera that is advertised to have a H.264 codec inside. However, after the first video test I have seen that a 43sec movie takes 123MB! How is this possible. I ...
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1answer
39 views

How to choose the right bitrate, H.264 profile and level for Web Video presentation?

I want to start producing videos and looking around the internet for usual bitrate ranges (VBR) and H.264 profiles and levels for Web Video exports. I found some guides with Vimeo and YouTube and ...
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1answer
48 views

Is 4K 4.2.0 just HD 4.4.4

I've been reading about codecs lately and found out, that the 4.2.0 codec combines 4 pixels color to one used for all 4 of them, effectively lowering the filesize. Now how does this compare to a ...
2
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1answer
420 views

Print to file: Details of every NAL unit in raw H.264 file

I have a raw H.264 file. I would like to retrive both length and frame number of every NAL unit in this file. The result must be printed to file. Is there any tool to do this? I have tried using H....
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18 views

H.264 data partition implemention

I’m trying to implement H.264 over RTP with as much error resilience and possible, for this I’m going to use the data partition feature from the extended profile. Yet I can’t find a library that ...
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0answers
123 views

Why does transcoding video with ffmpeg add unknown frames?

I have a video file, which is the recording of an eye-tracking experiment, that I want to transcode to be able to process it in Matlab. With ffprobe ffprobe -v error -show_format -show_streams ...
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2answers
71 views

Can you losslessly ediit H264 at the GOP level?

My scenario is this: I have a few .mp4 files containing H264 video with AAC audio. Each file was encoded from a DVR source. There are a few frames too many at both the beginning and end of the file (...
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1answer
80 views

Clip that plays fine in WMP is cut off in Sony Vegas

I imported a screen recording into Sony Vegas. When I play the original clip with Windows Media Player, it looks the way I expect it, with the whole screen visible. But when I play the clip in Vegas, ...
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1answer
22 views

Lossless and lossy compression techniques

Are MPEG and H.264 Lossless?? I need a brief explanation about lossy and lossles... And which compression technique is generally using in CCTV Surveillance applications of video??
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1answer
1k views

FFMPEG: Loop video to the length of audio

E.g. if video is 1 minute, but audio is 1 hour. Make video loop throughout for 1 hour of the audio track. I use this solution to loop image through the lenght of the audio ffmpeg -y -loop 1 -r 6 -i ...
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1answer
160 views

How do I convert H.264 Rec709 (“SRGB”) to H.265 HEVC 10-Bit Rec2020 (“Wide Gamut”)?

I'm looking to convert a standard colour gamut video to a wide gamut video. For example, I have a 1080p, 2K or 4K H.264 8-bit mp4. This is normally (eg. from YouTube) in Rec709 or "SRGB" colour space. ...
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0answers
17 views

Recompressing H.264 footage without lossing quality

I often use NVIDIA Shadowplay to record, and the footage is often always very inefficiently compressed, being about 40Mbps and 5 minutes long, when in reality I only need it to be 1 minute and I ...
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0answers
89 views

Converting .MTS (AVCHD format) to mp4 leads to a doubled frame rate [duplicate]

So, this my be a duplicate of How can I convert .MTS file (AVCHD) to .mp4 by ffmpeg without re-encoding H264 video stream? but I still don't understand what's the exact reason. When I try to convert ...
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0answers
264 views

Exporting Video Issues on a Crappy Laptop (Wondershare Filmora)

I am working on a video for my YouTube channel (which you can check out here) using Wondershare Filmora. I have a crappy laptop, and it is probably (I'm not sure) the reason why the final footage has ...
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0answers
75 views

Digitizing VHS: settings?

I have gotten myself a Video grabber (Basetech BR116). I have some old PAL VHS tapes I want to digitize. Since the signal is interlaced should I capture 25 or 50 FPS? Is it best to deinterlace during ...
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1answer
46 views

Are JPEG compression and H.264 intraframe compression the same process?

I was looking at how JPEG compression works, and to me it seems to be really similar to what H.264 (and other video codecs) does with its intraframe prediction step. In both algorithms the image ...
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1answer
1k 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 ...
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1answer
2k views

Exporting h.264 from Premiere Pro resulting in black screen on Windows 7

We have multiple reports of our h.264 video playing audio-only in IE11 on Windows 7. The video screen stays black. I can reproduce the problem. Here is an example video that exhibits the problem. ...
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1answer
197 views

Reencoding H.264 to H.264 made it 40% larger

I've got some livestreamed footage (encoded with constant bitrate), and I've been trying to reduce the file size for long-term storage. I figured that since encoding speed is no longer a constraint ...
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1answer
52 views

Shadowplay Footage Import to iMovie Introduces Audio Artifacts

I've been playing around with this to vary degrees of success and I'm getting slightly confused by what I'm seeing (or rather hearing in this case). Just playing the clips in a player like QT or VLC ...
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0answers
44 views

Best possible quality setting for screen recording (not games) and web presentation

Screen videos have text and simple geometric shapes, which need to stay sharp, detailed and crispy. The color should also remain untouched. With screen grabs, I want e.g. IBM blue to show as IBM blue ...
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2answers
393 views

H.264 slow scrubbing and playback performance

I have two videos, both roughly the same spec: A: H.264/AAC 1920x808 24FPS ~3015kb/s Using Quicktime player I can scrub through this movie smoothly and with fine detail. Jumping from one position to ...
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2answers
4k views

How do I encode videos into h.264 at 8k resolution?

I am trying to use premiere, but I wouldn't mind switching computer programs to accomplish my goal. h.264 is an amazing codec for exporting videos, it is the fastest I've seen yet. Same exact videos ...
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2answers
319 views

What are the best codecs and encoding options for a image sequence video?

I am trying to make a video out of an image sequence - Where each frame lasts for a second. The image sequence contains the same object shot from different distances. I'm guessing most default ...
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1answer
439 views

How does the h.264 encoder determine where to put i-frames?

I'm reading a bit on I-frames and their counterparts, P-frames and B-frames. I understand the usage. I-frames are the key to the compression and following P and B-frames can use the data in I-frames ...
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1answer
734 views

Audio issue on concatenation of TS segments

I have downloaded segmented ts files, which i concatenate into mp4 file. The problem is that audio a bit faster than video progress. The problem is appeared when i re-convert concatenated mp4 file. ...
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1answer
620 views

Transcoding 100+ files from H.264 to H.265

I am in a process of transcoding 100+ High Quality Bitrate 720p MKVs containing H.264 (x264) to H.265 (x265 / HEVC). I do this with HandBrake software under Linux Debian 9 on Intel Xeon E3-1225 v3 3....
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0answers
568 views

Wrong colours after exporting to MP4 using H.264 Codec

in my current project I am working in an sRGB colour space (32bpc) with the option "linearize workflow" enabled. My composition looks fine in after effects, but after exporting to mp4 using H.264 ...
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1answer
582 views

What's different between Premiere's own h.264 and QT h.264 encoders?

I noticed that Premiere(CC2017) can export h.264 through its own encoder and QuickTime. Are there any / what are the differences between these two? PP Native h.264 encoder QT h.264 encoder
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34 views

Adobe Premiere creates faulty mp4 that blinks in Safari

My collegue produced several videos in Premiere, exported them and we pushed them to Vimeo. Now when playing those videos in Safari, you will notice a black blink after a few frames. Other browsers ...
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0answers
323 views

ffmpeg H264 mp4 and AVCHD avc1 vs HDPR?

I am running the following command to get the stream data for mp4 and AVCHD video files. My goal is to understand the differences if any between the video streams. I used a JVC camcorder for the test. ...
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1answer
40 views

How do I preserve the filesize of an MP4 edited in After Effects?

I'm editing a small animation video (.mp4) of our app with After Effects (cropping composition to region of interest). I then add the composition to Adobe Media Encoder Queue and process it with the ...
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1answer
46 views

How to optimize h.264 to play it on every possible device

I coding videos in MP4 for my windows phone, but now I want to be sure that this videos will be played on every mobile device possible, so question is: What the best unified settings for H.264 codec I ...
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1answer
2k views

How can I generate a color-correct h264/MP4 from a DPX sequence using ffmpeg?

We are converting a sequence of DPX files into an MP4. When the artist uses Adobe Media Encoder CC to generate the video, the colors match the original DPX. When we use ffmpeg, the video has a reddish ...
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0answers
521 views

H264 capture from Mini Recorder

I've got a Blackmagic Design Ultrastudio Mini Recorder, which allows me to record HDMI and SDI in. In the list of supported codecs for capturing from it (both in premiere and its own software), I see ...
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1answer
57 views

Best encoding to fit 10hours of 1080p in 30gb?

I will be running a 10hour loop on a 1080p screen with only 30gb of storage. The loop will be created from a variety of 1080p .mp4s that will need to be compressed. (for example, one video is 12mins ...
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0answers
278 views

MPC-HC is altering the colors

In order to test a lossless recording system, I have to verify that the input video is exactly the same than the output video. As a test source I have generated an ffmpeg's testsrc pattern, which is ...
0
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1answer
65 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,...
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0answers
65 views

Change the slice mode during the encoding in H.264

I'm working in implementing a back pressure mechanism between to locutors in a video comunication to manage the bandwidth consumption. Does the slice modes and the rc modes affects the packets size ...
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2answers
3k views

Black frame strobing during CC export

I have a sub-3-minute sequence in Premiere CC, containing a single 4k DCI 23.98 AVC stream from a Sony FS7, with a couple static PNGs and 29.97 Quicktime Animation lower thirds. I need to export to ...
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2answers
287 views

Differences of h.264 and h.265?

What are the main differences between h.264 and h.265?
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2answers
37k views

Fix bad files and streams with ffmpeg so VLC and other players would not crash

It happened me many times that I could end up in corrupted video files: video downloaded from official sources but with torrent and for some reason not all the pieces are there in .mkv, .ts or .mp4 ...
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0answers
70 views

H264 encoding double image problem

I am getting double image like following with h264 encoding. This is the original image What could I be doing wrong here?
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1answer
974 views

How to prevent lossy re-encode of low-bitrate videos uploaded to YouTube

I have a huge number of low-res Flash videos (480x270, 30 fps, 800 Kbps) and I want to resample all those videos in 1280x720 with some added spatial sharpening and lomo filters to make them look nicer....
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1answer
210 views

How can I avoid Quicktime Vulnerability with h.264 encoded MP4 files?

I posted this earlier on SuperUser, but realized that this is likely the more appropriate forum for my question. We have several thousand very large MP4 files that have been encoded over the past ...
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1answer
1k views

Record desktop at 1080p60 in high quality

I am looking to record my desktop in high quality (not nearly as lossy as H.264). I have tried OBS @ 200mbps and nVidia Shadowplay @ 50mbps and the text on my desktop is still noticibly blurry when i ...
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3answers
63 views

What codec should I edit in on Premiere Pro?

I have a MacBook Air (13-inch, Early 2014) with base configuration. I have a bunch of footage off a Canon 700D which is in a H.264 codec. Now obviously, a MacBook Air does not have an external ...
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2answers
2k views

How to set double fps for tbc option of video

I need to set tbc option for output video. For example, input video has 25 fps with 50 tbc and my encoded video has 25fps with 25 tbc. I used settb and video_track_timescale but these options did not ...
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1answer
18k views

Encoding videos for MPEG-DASH

I read this article on encoding for MPEG-DASH, which has helped me a little and then follow up article. My end goal is to create a batch file that can read in a directory of MP4 files, and then ...