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Questions tagged [video-conversion]

The video-conversion tag covers software & formats related to converting videos from one format or container to the other.

0
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1answer
795 views

Create video from a growing image sequence using FFMPEG

I am planning to render a personal 3d project as an image sequence, where each frame takes about a minute to be created and saved as an image file. If I were to use the regular ffmpeg syntax to ...
0
votes
1answer
6k views

What is mlv video format? How can we open mlv file?

I recently downloaded a trial version of a proprietary software which contained videos. All the videos were of mlv format and could be opened through the application. But no other video player was ...
1
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2answers
526 views

How to rotate a video and have it playable on a TV set?

I have a video which originates from a phone, and which itself plays without problems on a Thomson TV set (via USB). The details of the video is the following: > avprobe 20170904_065655.mp4 ...
0
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0answers
35 views

How can I record 5-8 SD A/V inputs on Linux?

I would like to be able to record 5-8 video channels on a linux computer. While the videos are being recorded I would like to break them into 1-2 hour pieces and back them up. The source of videos ...
0
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0answers
506 views

Convert mkv with softsubs to mp4 with hardsubs

I have difficulty playing mkvs as they don't stream to my bluray nor play on Windows Media Center (homemade dvr). I can convert to mp4 and change eac3 to aac so everything I have can play the file but ...
0
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0answers
239 views

No sound even after conversion for mpeg movie

A number of years ago I digitized some old VHS tapes to the .mpg file type. At the time the digitization worked fine (both video and audio), but I recently went to play those files and they no longer ...
0
votes
1answer
191 views

How to add subtitle to video keeping aspect ratio?

I tried to convert a video with aspect ratio 16:9 and want to add subtitles. The final video has black bars (I need it that way for a portable media player). But the subtitles are not shown in the ...
0
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0answers
102 views

How do I maintain sharpness when scaling down Mp4 H264 video on browser?

I managed to create a sharp video after doing a lot of research. However, now my problem is when scaling down in the browser. I am trying to do something similar to this:https://framer.com/features/...
1
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1answer
244 views

Low quality output when scaling AVI and converting to MP4

I have been trying to scale and avi file, converting it to mp4 at the same time, but the output it horrible. I am using ffmpeg, and found several posts about this conversion without loosing quality. ...
1
vote
1answer
323 views

Can ffmpeg losslessly downgrade H.264 level from 4.1 to 4?

I have some .mkv files with h.264 video streams. When I performed the original encoding I limited the decoder level to 4.1 for compatibility with a Samsung SmartTV. Now I'm having issues with a ...
0
votes
1answer
1k views

ffmpeg mkv to mp4 results in black screen with no sound

I'm trying to convert an mkv video to mp4 but it isn't working with the codes I use. I usually use one of these 2 codes: ffmpeg -i input.mkv -c:v copy -c:a copy output.mp4 ffmpeg -i input.mkv -...
1
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0answers
422 views

Why a MP4 H.264 video looks fuzzy on Google Chrome but sharp on Firefox?

This is the file I am trying to open directly into Chrome (It happens on websites but it seems the problem is with the rendering engine) http://wikisend.com/download/914020/pipe-handbreak.mp4 It ...
1
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0answers
611 views

ffmpeg conversion to MP4 not working

I am sort of a newbie when it comes to FFMPEG (with php) but I have have been studying up on it for the last couple of weeks. when i use shell commands like: echo shell_exec('ffmpeg -i input.3gp ...
0
votes
1answer
166 views

FFmpeg concatenation dropping part of first video

I am using ffmpeg.exe to concatenate two videos together. The first video is essentially a five-second intro rendered at 1080p at 25 frames per second, and it will always stay the same format. The ...
0
votes
1answer
277 views

convert video into low resolution RGB32 format

I am looking for a way to convert a movie file in e.g. mov or mp4, into a low resolution RGB32 (red, green, blue, alfa) file which I could read to control an nxm LED array. The conversion should ...
8
votes
1answer
5k views

FFmpeg split video and merge back

I'm trying to use FFmpeg to split video based on some start_time and end_time inputs, and replace those with other video files. For instance, for input 10 15 I will need to replace EXACT seconds 10 to ...
-1
votes
1answer
520 views

What file formats does HDHomeRun DVR's app scan/monitor?

Title is the question. I'm using file conversion software, MCEBuddy to trim video files, mpg - HDHomeRun Unprocessed, and would prefer to convert the file to a format more widely adopted, ideally ...
0
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1answer
84 views

Cannot play a particular MP4 file

I need to play an MP4 file that I received. I tried to play that on Mac and PC both also tried to play it with VLC media player, windows media player, QuickPlay etc. However, It just does not play. ...
3
votes
1answer
9k views

ffmpeg warning: “Timestamps are unset in a packet” when converting H264 to mp4

I am getting the following warning message when executing ffmpeg: [mp4 @ 00000000025c00a0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. ...
0
votes
1answer
2k views

ffmpeg conversion from WebM to MP4 – how to keep file size?

I'm trying to convert a WebM file to MP4, using the following parameters: ffmpeg -loglevel info -i 2017-05-01-122851.webm -c:v libx264 -preset slower -crf 20 -bf 2 -trellis 2 -cmp 2 -subcmp 2 -g 45 -...
0
votes
0answers
219 views

Does converting from HDMI to Displayport using an active converter increases Hz?

With a monitor with a refresh rate of 144 HZ, and this active converter: https://www.amazon.co.uk/StarTech-HDMI-DisplayPort-Active-Converter/dp/B004I6IYSM?th=1 Does the refresh rate increase from ...
0
votes
2answers
87 views

Mysteri .avi - no sound on original but sound on copy

I have an old .avi file where the sound is just scratchy, no mystery there but I have a wmv file presumably derived from the .avi file but the wmv HAS the sound. Has anyone any ideas what may have ...
0
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0answers
146 views

Concatenate videos from txt file while adding a watermark

I'm trying to concatenate videos from a text file using this commmand ffmpeg -f concat -safe 0 -i video_folder/movies.txt -c copy video_folder/output10.mp4 and I also want to add a watermark using ...
0
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0answers
728 views

Burning subtitles using ffmpeg into an rtmp stream using an mkv with embedded .ass subtitles

I've been pulling my hair out trying to figure out exactly how to get this done. I have video files that I'm streaming via rtmp using ffmpeg that I'm trying to burn embedded (?) .ass subtitles into. I'...
0
votes
1answer
515 views

How do I use ffmpeg to increase the framerate of a video without affecting audio quality?

I have a ~30k frame video at 25 fps that I'd like to make 50 fps and keep the same running time. This would probably involve duplicating every frame. However, I'd like the audio track to be unchanged. ...
-4
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1answer
997 views

Convert a video with command prompt [closed]

How can I convert a video file from ".avi" to ".mpeg" with the command prompt? I use Windows 10.
0
votes
1answer
2k views

Error while merging two mp4 video files with ffmpeg

I have few mp4 video files that i wants to merge them. I am using this commands to convert .mp4 to .ts and then merge them together. referance ffmpeg -i part1.mp4 -bsf:v h264_mp4toannexb -f mpegts -...
8
votes
2answers
5k views

Why is encoding VP8/9 so slow compared to H.264?

Recently I wanted to try out the Webm codecs VP8 and VP9 but when I ran ffmpeg to encode a H.264 MP4 file into one of the other two codecs, I realized that the encoding is (by almost an order of ...
0
votes
1answer
102 views

How to Cut video clip and convert from .avi to .mp4 in a fast way

Here is my command C:\Users\Example\Desktop>E:\OUTPUT\bin\ffmpeg.exe -i F:\BackUp\movie.avi -ss 4000 -t 60 -pix_fmt yuv420p output.mp4 I am trying to cut and convert a movie.avi file from 4000(...
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0answers
246 views

How to use Dualhead2Go with HDMI port

I have a Dualhead2Go Digital Edition and my computer just have a HDMI port so I buy a HDMI to VGA converter. But on the full resolution of 3840x1200 to support 2 monitors with 1920x1200 each, it does ...
0
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1answer
75 views

How to Cut a video file and simultaneously convert it in to .mp4 format output using FFmpeg

Here is the command to cut video file ffmpeg.exe -i inputvideo.avi -ss 0 -t 10 outputvideo.avi but i want to convert it from inputvideo.avi to outputvideo.mp4 format simultaneously Thanks in ...
0
votes
1answer
78 views

How to scale video to 3.5:1 without quality lose on Ubuntu?

I tried to use ffmpeg: ffmpeg -i <input_file> -vf scale=3.5:1 <output_file>, also tried 3,5 instead of 3.5. But it tells that there is invalid size. I would appreciate any application, ...
2
votes
2answers
2k views

FFmpeg low CPU usage

I'm using FFmpeg to convert a number of files from MP4(H264 & AC3) to MP4(H264 & AAC) using the command ffmpeg -i in.mp4 -c:v copy -c:a aac out.mp4 I have a 4 core CPU with hyper-threading ...
0
votes
1answer
2k views

Convert Series of PNG's into MP4 Video Using FFMPEG Where Each Photo is 1 Frame and Each Frame is Played for 1 Sec

I have a series of 15 PNG Files - https://www.sendspace.com/file/jrpbl1. I would like to create an MP4 Video of them using FFMPEG. In my video I'd like to have 15 Frames (One per image) where each is ...
0
votes
1answer
894 views

Convert MOV Video File Encoded as `qtrle` in Windows Using FFMPEG

I downloaded the latest FFMPEG for Windows (Version 3.2.4). I wanted to use it for converting a MOV File which contains qtrle uncompressed video. The video can be downloaded on this link - https://...
0
votes
1answer
932 views

FFmpeg: Should I scale video before encoding

I'm currently encoding my dvd collection for convenience. Before encoding this particular title of DVD, I've made some samples and when playing them at TV I noticed that upscaled (with ffmpeg) videos ...
0
votes
1answer
595 views

Converting WMV—from Ashampoo Snap 7—to MP4

I've taken a (partial) desktop video using Ashamphoo Snap 7 in .wmv format. I couldn't find any option which allowed me to record in other formats. I want to convert it to .mp4, preferable x264 (I'm ...
8
votes
2answers
2k views

Convert Mp4 to Mp3 with thumbnail

I'm able to convert a mp4 to a mp3 in ffmpeg, but I'm not sure how I would add in a thumbnail of the video. Currently have this to convert from mp4 to mp3 ffmpeg -i video.mp4 -acodec libmp3lame -...
1
vote
0answers
2k views

Unable to parse option value “-1” as pixel format when transcoding mp4 to mp4 using ffmpeg

I was trying to debug an issue where my mp4 file fail to upload to youtube (with "Upload failed: Can't process file" error). The video plays normally in vlc player and is able to be loaded in Vegas ...
1
vote
1answer
173 views

FFMPEG create image sequence of equal length to original video

I am trying to convert a video to an image sequence for importing into my video editor. First I check the frame rate with: ffprobe -v 0 -of compact=p=0 -select_streams 0 -show_entries stream=...
9
votes
3answers
22k views

VLC could not open the mp4a audio encoder

I am attempting to use the Convert/Save feature of VLC to convert an mkv file to an mp4. (H.264 video with MPEG-4 AAC audio) I get the following error: VLC could not open the mp4a audio encoder ...
0
votes
0answers
323 views

How to recover and play this seemingly damaged file

I was recording a video with an Android mobile for a minute only to discover that the phone was off by the time I stopped recording. Why would it power off, I have no idea, for the battery was "blue" ...
1
vote
1answer
855 views

How to create chapters from HLS segments, when converting M3U8 into MKV?

I'm converting an existing M3U8 with dozens of segments into an MKV using ffmpeg: ffmpeg -i http://example.com/foo.m3u8 -c copy foo.mkv FFMpeg is gluing the segments listed in the M3U8 together and ...
0
votes
0answers
443 views

Hanbrake audio annomalies with h.264 and AAC audio with large 9 GB source file

Using Handbrake 1.0.2 Source file is 9.3 GB AVI using h.264 codec lossless and AAC for audio Source file plays fine in VLC, audio sounds perfect When encoding source file to h.264 constant quality 32,...
0
votes
0answers
409 views

ffmpeg converts audio out of sync

I am converting a sample .mkv file to a .mp4 file. The problem I run into is that the sound is out of sync. As you can see in the log, the longer the movie plays, the closer in sync audio and video ...
1
vote
1answer
2k views

Converting a .flv file to .mp4 format through ffmpeg results in error

I currently use ffmpeg version 3.2.2, and the issue I run into is that when I try to convert a sample .flv file, it does not convert it properly to a the expected .mp4 format. The error I come across: ...
-3
votes
1answer
2k views

Converting images into video using FFMPEG using a Batch script [closed]

I'm using ffmpeg to convert a list of image into a video, I write a batch script to to the job, but it didn't works ffmpeg -f image2 -start_number n -i "IMG0%%.jpg" video.mpg -vcodec mpeg4 test.avi ...
1
vote
0answers
71 views

Merging two videos while skipping common parts

A customer has a collection of tutorial videos, all of which have the following structure: preview (or recap) intro (always identical) repeated part from previous video (optional) new content outro ...
0
votes
1answer
2k views

Video cut with missing frames in FFmpeg

I have tried every possible command to cut a portion (1-3 mins) of an H.264 mp4 video but it comes out good & bad. My video is 29.97 FPS, 1080p, ~80 minutes, ~3.5 GB, and at ~6200 KB/s bitrate. ...
1
vote
1answer
1k views

How to rotate vertical video for DVD

I have a video recorded in vertical format and I want to put it on a disc but it keeps turning the video sideways so it'll be horizontal. Any way to make it play vertical? I'm using Daemon Tools Lite ...