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Questions tagged [h.264]

Also known as MPEG-4/AVC, an advanced video encoding standard, widely used in Blu-ray and streaming video.

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How can I remove every nth frame from raw video using ffmpeg?

I have many cine films that have been digitally converted. They have been converted as a 25 fps with 2 frames in every 23 duplicated. I need to remove the duplicated frames using a bitstream filter so ...
DaveB44's user avatar
  • 11
1 vote
0 answers
56 views

Out-of-order frames when using FFmpeg to download DASH stream

I'm trying to use ffmpeg to download a DASH stream. It works OK but it seems like in the output file there are some frames that are out-of-order (e.g. for some frames the pts value is lower than the ...
Danj's user avatar
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1 vote
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86 views

ffmpeg extremely slow HEVC without any major changes in the system

I have the same dedicated NAS machine for a while now with AMD Ryzen 7 3700X 8-Core it's not the strongest but more than enough for my home NAS usage. I also use the same machine to re-encode h264 and ...
kali's user avatar
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0 answers
79 views

Having multiple issues when attempting to convert h.264 files to h.265 using HEVC

I am using RiaanAspeling's script for the conversion of my library that I currently have, most of it is H264 and I want to convert it to H265 to reduce the size of the files that I have hosted on my ...
tito-willis's user avatar
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27 views

Fail to convert png from 3gp

Here is the command I used to convert the video. ffmpeg -skip_frame nokey -i input.3gp -vsync vfr -frame_pts true output.png (The command can't be modified because this is a code section captured from ...
Alex's user avatar
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0 answers
60 views

Corrupted H.264 file: NAL unit header mystery

I'm currently facing a challenge for university with a corrupted H.264 file and could use some guidance. As part of an exercise, I've been examining the H.264 stream, which is composed of NAL units. I'...
josef's user avatar
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151 views

How do you create an MPTS file on ffmpeg with two h264 inputs?

I need to contain two h.264 files (same video, different resolutions) within the same MPTS container, but I can't quite figure out how to use two inputs to create one output. I tried using ffmpeg -i (...
fffrdec's user avatar
1 vote
0 answers
362 views

How to Speed Up Complex Text Overlay in FFmpeg

I'm using FFmpeg to overlay text on videos, and I find the process to be quite slow. The operation becomes especially slow when I add complex drawtext filters. I'm running this on a MacBook Pro with ...
mlika's user avatar
  • 11
0 votes
0 answers
161 views

h264_qsv is choppy when live streaming

I am trying to do live streaming of video games using h264_qvs, but is choppy when compared to libx264. Here are some variations of the ffmpeg command I am running: Variation 1 ffmpeg.exe -y -hwaccel ...
Devin Dixon's user avatar
0 votes
1 answer
884 views

Edit video h.264 metadata without encode

How can I edit these video (h264) parameters (on pic) without encode? VUI parameters "video_signal_type_present_flag" and "colour_description_present_flag". As far as I understand, ...
Ligre's user avatar
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0 answers
694 views

How to set H.264 metadata in ffmpeg (fixed_frame_rate_flag)

I would like to set the fixed_frame_rate_flag in the H.264 metadata so that MediaInfo will report a constant frame rate when scanning the file. Supposedly I can set that flag using the bitstream ...
Danny's user avatar
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1 vote
1 answer
288 views

FFmpeg with Quicksync: unable to hardware decode file

I'm trying to convert a h264 video to h265 using hardware decoding/decoding of the iGPU (Quicksync). Decoding does not work throwing the error "Impossible to convert between the formats supported ...
MuchToKnow's user avatar
1 vote
2 answers
507 views

Smart trimming long videos with FFmpeg

I want to be able to trim a little bit off the beginning and end of a long video with FFmpeg. I can do this with a command like: ffmpeg -i input.mp4 -ss 13 -to 59 output.mp4 FFmpeg will seek ...
Jon G's user avatar
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0 answers
85 views

One IP camera playing, one isn't. Codec incompatibility?

I am new to video codecs and would like to understand my problem better. I am using Siemens camera display in TIA V17 to display the RTSP streams of some IP cameras... IP camera A: Supports H264 but ...
dcJ's user avatar
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0 votes
1 answer
189 views

Replace video track in MKV with track from .h264

I want to replace only the video part in my existing mkv file with the video.h264 file I created externally, I don't want to interfere with other parts or features in my mkv file such as audio or ...
sweetngx's user avatar
0 votes
1 answer
1k views

Windows ffmpeg hardware accelerated video encoding FAILS using codec hevc_amf but works with codec h264_amf

I'm running ffmpeg on Windows 10 on a machine with an AMD Radion HD 7700. Hardware accelerated h.264 works fine while HEVC encoding fails. The version of ffmpeg is: ffmpeg version 5.1.2-...
mbmast's user avatar
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1 answer
275 views

FFMPEG, producing stream, wish to write to disk while streaming, segmenting

) I have fought the long battle of getting somehow familiar with this wonderful beast of a thing, FFMPEG. I have coped with several things, learned that I will never get old enough to at least master ...
CSB's user avatar
  • 1
3 votes
1 answer
2k views

Preset "Slow" producing much bigger files than preset "Ultrafast" - Why?

Today I tried to find out which difference in file size the preset slow makes compared to the preset ultrafast when encoding a video (if all other parameters are the same). I took a video with ...
Binarus's user avatar
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I don't know how to play this videos

This videos are from an IP camera but I don't know how or where I can play it. I tried with VLC using a demuxer for h.264 but it doesn't work. I tried converting the videos to mp4 but it looks like ...
RubenTGT's user avatar
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1 answer
1k views

Different outputs when encode to h265 using CPU only and GPU together

I'm using ffmpeg to convert .mp4,.mkv files with enconde h264 to h265 using CPU only, if using GPU together will outputs the same as using cpu only? for %%a in (*.mkv, *.mp4) do ( ffmpeg -i "%...
Ricardo's user avatar
  • 115
2 votes
2 answers
3k views

How to extrack motion vector data without decoding the whole video

I want to extract the motion vector from the encoded h264 stream without performing a full decode of the frame. I'm using the FFmpeg library and am aware of extracting the information using the ...
M.Akyuzlu's user avatar
  • 123
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0 answers
1k views

Why I do get "Segmentation fault (core dumped)" when using ffmpeg encoding AMD AMF H.264 in Ubuntu?

Hello I built ffmpeg with AMD AMF drivers on Ubuntu 22.04 and when I run this command: ffmpeg -i video_sample.mp4 -c:v h264_amf output.mp4 I get this error: ffmpeg version N-107316-gf9dd8fcf9b ...
Max Dax's user avatar
  • 59
0 votes
0 answers
246 views

DVR error: kex_exchange_identification: read: Connection reset by peer

My DVR is connected to internet but when ssh, the error is kex_exchange_identification: read: Connection reset by peer. It is port 22 and I cannot access the Linux terminal. The system cannot be ...
Anhad Chugh's user avatar
0 votes
1 answer
7k views

ffmpeg command to convert from mp4 video to .h264 raw frame with avcc format

I want to convert my mp4 video (BigBuckBunny.mp4) to BigBuckBunny.h264 file. I used the following the command in ffmpeg. ffmpeg.exe -i c:\BigBuckBunny.mp4 -c:v libx264 c:\Bunni2.h264 This command is ...
karthick's user avatar
0 votes
1 answer
679 views

How do I find what bitrate a CPU/GPU can decode?

I'm exporting videos to play locally on a dedicated player with a CPU like this. The integrated GPU supports up to 4096x2304@60Hz, I assume that's talking about uncompressed video, right? I also see ...
Toeb's user avatar
  • 3
1 vote
0 answers
566 views

ffmpeg - Redownload missing fragments to fix downloaded stream

I have dowloaded an H.264 video stream using ffmpeg -i <URL> -c copy <name>.mp4 but ffmpeg reports that it has skipped some fragments. Since the stream is still online (with, I suppose, ...
Arch Stanton's user avatar
0 votes
0 answers
359 views

Losslessly reducing framerate of a 'video of a video'

I asked this yesterday but it was incorrectly closed as a dupe of question:Reduce video frame rate without dropping useful frames The difference between that question and this question is - in that ...
JohnDoughmaker22's user avatar
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1 answer
5k views

FFmpeg: h264_qsv slower than libx264 (real-time buffer too full)

I use configuration: Windows 10 IoT, Intel Celeron N3350E (with Intel HD Graphics). Runing this line: ffmpeg -f dshow -i video="USB Video":audio="USB Digital Audio" -c:v libx264 -...
ffvideoner's user avatar
1 vote
1 answer
6k views

FFmpeg h264_qsv: Error initializing an internal MFX session: unsupported (-3)

Im using ffmpeg build for Windows from gyan.dev: release ffmpeg-5.0-full-build with hardware-support. I need to capture a video from a USB video device, compress it and write it to a file. I am using ...
ffvideoner's user avatar
0 votes
0 answers
730 views

Is a CRF of 1 overkill?

I am trying to save my collection of DVDs to my Mac to have in the TV app. I am using libx264 to encode from mpeg2video to h264. I want to maintain as much quality as possible and file size is not a ...
TheCoderPro's user avatar
0 votes
0 answers
1k views

H265 10 bit to H264 8 bit through NVENC looks terrible

I'm currently using FFMPEG run with Sickbeard Mp4 Automator to convert H265 video to H264 since my phone chugs hard playing H265 10 bitvideo. I set it to use NVENC and it's unnoticeable for brighter ...
Beefmaster5000BCE's user avatar
1 vote
0 answers
2k views

I need FFMPEG command to convert some video files from h.265 to h.264 with Nvidia hardware

I have a decent Nvidia graphics card, capable of h.265 and h.264 encoding and decoding in hardware (Geforce RTX 2060), running on a Ubuntu installation. I have a whole bunch of video files that I need ...
MarcNBarrett's user avatar
3 votes
1 answer
8k views

How to convince ffmpeg that input is raw H264?

I have a raw H.264 video stream (which starts with hex 00 00 01 FC ..., a 3-byte start code followed by a NAL unit). ffmpeg can process it but it really doesn't want to... Let's test Let's say the ...
Duke Nukem's user avatar
  • 1,235
1 vote
1 answer
3k views

FFMPEG: “DLL amfrt64.dll failed to open” on Windows

I experienced the following issue. I'm using ffmpeg to batch resize/compress photos and videos on Windows 10. I used a version 3 and since upgraded to ver 4.4 of ffmpeg the quality of outputs dropped. ...
barteck's user avatar
  • 31
1 vote
0 answers
350 views

FFMPEG Motion Vector Block Format

I'm trying to extract motion vectors from h264 videos using ffmpeg and the AVSideData API. I'm a little confused about the format as there are some subtleties that aren't well documented, and I'm ...
Max Ehrlich's user avatar
0 votes
1 answer
4k views

Range of "global_quality" value for h264_qsv encoder?

What is the range of the -global_quality setting for ffmpeg's h264_qsv encoder (4.3.2-2021-02-27-full_build-www.gyan.dev, Windows)? Ffmpeg's documentation for the encoder (archive) states: The ...
Jason C's user avatar
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0 votes
0 answers
523 views

ffmpeg can't change number of B-frames

When streaming from a source I keep receiving frames following the same pattern: I-frame P-frame I-frame P-frame I-frame P-frame .... I tried many options and read as many questions here as I found, ...
user1315621's user avatar
0 votes
1 answer
117 views

Newbie : using h264 to encode mp3 with static image higher quality?

I need to put an mp3 up on youtube and Odyssee with a static image that is shown from beginning to end. Needs to be h264 to go onto Odyssee. Works fine but the static image is of grainy low quality. ...
rideforever's user avatar
0 votes
0 answers
464 views

ffmpeg libx264 is noisy

After converting video with ffmpeg to H264, my video is noisy. ffmpeg -i http://192.168.1.10:5530/bysid/106 -map 0:v:0 -map 0:a:0 -c:v libx264 -c:a mp2 out.mkv Normal: Noisy subtitle: Same result ...
mohsen nayyeri's user avatar
4 votes
1 answer
7k views

Are HEVC and H265 same? In FFmpeg they give different results why?

Recently I re-encoded a H264 video to HEVC using FFmpeg and Intel hevc_qsv hardware acceleration and libx265. hevc_qsv results in higher sized video and libx265 results in 50% lower sized video. I ...
user avatar
2 votes
1 answer
2k views

Remote Desktop AVC 444 Hardware Encoding with Super Ultrawide Display

As my daily driver workstation, I RDP from a Windows 10 desktop to a Windows 10 VM with a GTX 1080 passed through. I just upgraded my monitor from 3440x1440 to 5120x1440. I noticed recently that the ...
virtualbitz's user avatar
1 vote
0 answers
66 views

How to set the GOP(group of picture) of RDP on Windows Desktop?

I found that the GOP length of RDP is 2592000 when I use gfx AVC444. I want to decrease this value. How can I decrease this value on windows? Here is h264 parse data. 0xcb 0xb2 0x13 0x92 0x98 0x73 ...
Top Talent's user avatar
0 votes
1 answer
910 views

ffmpeg not making the correct video size

I've been trying to join a bunch of .png files into an mp4. The .png files are all 1920x1080 but my output file is always smaller, i.e. 1920x1072. What silly mistake have I made here? ffmpeg -...
Robinson's user avatar
  • 145
1 vote
1 answer
158 views

ffmpeg creates large compressed files for tiny videos?

When compressing very small videos, there seems to be a large overhead in the video container itself. Here are some examples using a single-frame 16x16-pixel all-black image: ffmpeg -f lavfi -i color=...
Hugues's user avatar
  • 3,377
2 votes
0 answers
715 views

ffmpeg lags when streaming video+audio from RPi Zero W with Logitech C920

I've been trying to setup a baby monitor with a Raspberry Pi Zero and a Logitech C920 webcam. It does work with VLC (cvlc) but it lags too much and gets worse over time. So I am playing around with ...
Ema's user avatar
  • 21
4 votes
1 answer
7k views

Set keyframe interval in ffmpeg when using nvenc

OBS uses nvenc when encoding live streams. In the guide "NVIDIA NVENC OBS Guide", an advanced option is listed as: Keyframe Interval: Set to 2. Streaming platforms may limit what you can ...
Isabella's user avatar
  • 243
2 votes
0 answers
695 views

How to get no-reference video quality metrics (or numerical quality score) for 1080p, h264 video?

For the life of me, I can't find a suitable way to do this. I have 3 videos (all h264), which supposedly came encoded from the same source (they have the same content / offset by up to a second). I do ...
13steinj's user avatar
  • 121
2 votes
0 answers
918 views

Maximum possible bitrate for HEVC videos with hardware encoding in Premiere Pro

I am trying to export a series of images as a 4K HEVC video (it is a long series) and I am using Premier Pro 2020 to do it. I found I can switch to High tier and this allows me to go over 25Mbit ...
miran80's user avatar
  • 237
1 vote
1 answer
2k views

How to convert h.264 (MP4) to Theora (FFmpeg)

How to convert h.264 to Theora using FFmpeg. I generally use all the -qscale commands etc, but the quality is hopeless anyway. The point is that the movie freezes after a few seconds and only ...
Eqsz's user avatar
  • 31
0 votes
1 answer
154 views

Compressing an MTS file to MP4 gives error in QuickTime

I have a long video file that I want to trim, resize, and compress with H264: ffmpeg -y -ss 1.2 -to 2:03.800 -i long.MTS -vcodec libx264 -vf scale=320:-1 -vb 500k short.mp4 The file plays in VLC and ...
emonigma's user avatar
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