Questions tagged [lossless]

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How to cut parts from a video file without quality loss

I have a few large video files (in various formats: .avi, .mp4 and .mkv) which only contain a few interesting scenes I want to keep. I'm looking for a way to cut these scenes out of the original video,...
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1 vote
1 answer
183 views

Merge / Concatenate Video Files in a Lossless Manner (No Encoding / Compression)

I have few video files I'd like to merge. I'd like to create a single video of them without any compression, just one after another. How can it be done using FFMPEG? For the answer we may assume the ...
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1 vote
1 answer
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High losing of quality after rendering sony vegas pro 17

I am rendering a video of resolution 2704 x 1520 of 50 FPS on sony vegas. Here are the parameters of the videos : I'm trying to render for a clip video on youtube. However I have an important loss of ...
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  • 111
2 votes
1 answer
23 views

Reverting Loss from .MOV (MPEG-4 Compression)

I was wondering if it is possible to revert the loss that was caused by MPEG-4 compression. I had HD quality images and our colleague made the grave mistake of converting these HD images into a "....
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2 votes
1 answer
23 views

Concatenate H.264 raw but basic streams without reencoding or quality loss

How does one go about concatenating several H.264 raw streams into one without reencoding or quality loss? The streams lacked any advanced features and represented contuous recording. There is no ...
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1 answer
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How to convert the DVD .VOB collection to MPEG without re-encoding (and quality loss)?

How to convert the DVD .VOB collection to MPEG without re-encoding (and quality loss)? The .MPEG files are what DVD format is built upon, the singular files are easy to handle, and overall, can be ...
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  • 200
2 votes
2 answers
248 views

How to cut MPEG and H.264 files frame-accurately without re-encoding?

Occasionally, the video-files need to be cut to keep only the relevant parts. Thus, how does one go about cutting the common video files (H.264, MPEG) without any re-encoding and thus quality loss?
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  • 200
4 votes
1 answer
2k views

Lossless convert 3gp video to mp4 using ffmpeg

I'm trying to get lossless conversion of 3gp to mp4 using ffmpeg. I tried ffmpeg -i input.3gp -vcodec h264 -c:a aac output.mp4 I tried with "libx264" for the video codec, I tried just a ...
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2 votes
2 answers
653 views

Is CABAC encoding lossy or lossless in ffmpeg?

I've been looking into how to compress a video using ffmpeg when I stumbled across CABAC encoding which I could specify by using the libx264 for the video codec and pairing it with the proper ...
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7 votes
3 answers
4k views

Using ffmpeg to add height (as black bars) to video file without quality loss

I have a file of resolution 3840x1632, but my TV stretches the picture vertically to fill up all 2160 pixels of height. Is it possible to use ffmpeg to add blank / black height, while preserving the ...
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2 answers
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Convert variable framerate ~60 FPS to constant 60 FPS losslessly

I have gameplay footage recorded with ShadowPlay (“GeForce Experience”) at 60 FPS, which as I understand results in variable frame rate, because the game drops frames sometimes. However, trying to use ...
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25 votes
2 answers
40k views

Convert mp4 to webm without quality loss with ffmpeg

What is the best way to convert a mp4 file to webm without quality loss (using vp8 or vp9) with ffmpeg? If I do ffmpeg -i in.mp4 out.webm the quality is very bad. I can specify a target bitrate via -...
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  • 421
1 vote
1 answer
1k views

x265: Is it possible to re-compress HEVC video without quality loss?

My situation: Transcoding 1080p bluray videos to HEVC. Audio untouched; My rig is old (pre-2012) and to speed up the process I'm using --preset ultrafast; From x265 documentation, I understand that ...
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  • 113
9 votes
7 answers
4k views

Lossless screen-recording software

For a small project of mine I want to record short screen-casts which show features of my program. Currently, I'm using a small app on my Ubuntu box which creates directly animated gif output. The ...
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  • 195
5 votes
3 answers
2k views

creating a lossless mp4 screencast

I'm trying to create a screencast for playback on the web. Would like to use h.264, webm, and ogg. The source files are in the Apple Animation codec, and they look perfectly accurate. However when I ...
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