Re: [FFmpeg-user] av1_vaapi encoding testing

On Mon, 25 Sep 2023 04:39:53 + "Xiang, Haihao" wrote: > On Vr, 2023-09-22 at 22:11 +0200, Patrick M. wrote: > > On Fri, 22 Sep 2023 20:04:57 +0300 > > Dennis Mungai wrote: > > > > > > > > > That's good to hear. You may also want to ensure that the likes of OneVPL > > > are up to date if yo

[FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

Is there an equivalent of Drobox Lepton but for h.264 videos? Lepton is a lossless compression algorithm to compress jpeg at around 20% there initial file size without any data loss. This is ideal to achieve jpeg. What about h.264 videos? -- Best Regards, Stephane Archer

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

сб, 30 сент. 2023 г., 16:58 Stéphane Archer : > Is there an equivalent of Drobox Lepton but for h.264 videos? > Lepton is a lossless compression algorithm to compress jpeg at around 20% > there initial file size without any data loss. This is ideal to > achieve jpeg. > What about h.264 videos? >

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

On Sat, Sep 30, 2023 at 10:00 AM Andrew Randrianasulu < randrianas...@gmail.com> wrote: > сб, 30 сент. 2023 г., 16:58 Stéphane Archer : > > > Is there an equivalent of Drobox Lepton but for h.264 videos? > > Lepton is a lossless compression algorithm to compress jpeg at around 20% > > there initia

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

Been very seriously considering design scope. Dropbox is a no-go. Want to connect offline to describe your use case? On Sat, Sep 30, 2023 at 10:10 AM Stéphane Archer wrote: > On Sat, Sep 30, 2023 at 10:00 AM Andrew Randrianasulu < > randrianas...@gmail.com> wrote: > > > сб, 30 сент. 2023 г., 16

[FFmpeg-user] How to merge and map 1 video file with 4 audio files?

How to merge and map 1 video file with 4 audio files? We've have 1 video file, 4 audio files, all same length. The video file is DNxHD36 The audio tracks are all .wav The goal is to merge all 5 files in sync Based on https://ffmpeg.org/ffmpeg.html#Advanced-options I tried the following: ffmpeg

Re: [FFmpeg-user] How to merge and map 1 video file with 4 audio files?

сб, 30 сент. 2023 г., 19:08 Media Mouth : > How to merge and map 1 video file with 4 audio files? > > We've have 1 video file, 4 audio files, all same length. > The video file is DNxHD36 > The audio tracks are all .wav > > The goal is to merge all 5 files in sync > > Based on https://ffmpeg.org/ff

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

On Sat, Sep 30, 2023 at 11:00 AM David Bernat wrote: > Been very seriously considering design scope. Dropbox is a no-go. Want to > connect offline to describe your use case? > > > On Sat, Sep 30, 2023 at 10:10 AM Stéphane Archer > > wrote: > > > On Sat, Sep 30, 2023 at 10:00 AM Andrew Randrianas

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

сб, 30 сент. 2023 г., 19:31 Stéphane Archer : > On Sat, Sep 30, 2023 at 11:00 AM David Bernat > wrote: > > > Been very seriously considering design scope. Dropbox is a no-go. Want to > > connect offline to describe your use case? > > > > > > On Sat, Sep 30, 2023 at 10:10 AM Stéphane Archer < > ar

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

On 9/30/2023 7:00 AM, Andrew Randrianasulu wrote: well, h264 videos already heavy and usually lossy compressed, any further compression will be not lossless There's one-way compression that reduces size by throwing away data (e.g. jpg) and two-way compression that reduces size but the result c

Re: [FFmpeg-user] Is there an equivalent of Drobox Lepton but for h.264 videos?

Hi, I have no information on how Lepton actually works, but it's presumably making use of redundancy inherent to JPEG which make it possible for lossless compression to reduce their size so dramatically. JPEG is a very old standard, developed at a time of very limited computer resources, and all

Re: [FFmpeg-user] How to merge and map 1 video file with 4 audio files?

> On Sep 30, 2023, at 09:31, Andrew Randrianasulu > wrote: > > may be remove all OUTPUT_CHx lines so output will be clearly into one mxf > file? Thanks Andrew, will try! What made you think removing the "remove all OUTPUT_CHx " was the right move? What I'm hoping for, big picture, is to un

[FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

Is there any good reason why FFmpeg which sees that the video file input and output match every single characteristic doesn't copy the stream to avoid useless reencoding? Basically doing "-vcodec copy" automatically. -- Best Regards, Stephane Archer __

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

Am 30.09.23 um 20:46 schrieb Stéphane Archer: Is there any good reason why FFmpeg which sees that the video file input and output match every single characteristic doesn't copy the stream to avoid useless reencoding? Basically doing "-vcodec copy" automatically. is there a good reason to thro

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

On 9/30/2023 12:07 PM, Reindl Harald wrote: is there a good reason to throw a video file through ffmpeg when you don't want to touch it? Changing the container or working only with the audio or subtitle tracks. So yes, there is a good reason. z! ___

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

> On Sep 30, 2023, at 12:07 PM, Reindl Harald wrote: > > > Am 30.09.23 um 20:46 schrieb Stéphane Archer: >> Is there any good reason why FFmpeg which sees that the video file input >> and output match every single characteristic doesn't copy the stream to >> avoid useless reencoding? >> Basicall

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

> is there a good reason to throw a video file through ffmpeg when you> don't >want to touch it? I guess you might want to touch the audio but not the video, maybe? In general, I suspect the reason it's not easy to implement the requested feature is that it isn't often trivial, or even possible

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

Am 30.09.23 um 21:29 schrieb Carl Zwanzig: On 9/30/2023 12:07 PM, Reindl Harald wrote: is there a good reason to throw a video file through ffmpeg when you don't want to touch it? Changing the container or working only with the audio or subtitle tracks. So yes, there is a good reason wha

Re: [FFmpeg-user] How to merge and map 1 video file with 4 audio files?

сб, 30 сент. 2023 г., 20:58 MediaMouth : > > > > On Sep 30, 2023, at 09:31, Andrew Randrianasulu > wrote: > > > > may be remove all OUTPUT_CHx lines so output will be clearly into one mxf > > file? > > Thanks Andrew, will try! > > What made you think removing the "remove all OUTPUT_CHx " was the

Re: [FFmpeg-user] Is there any good reason why FFmpeg doesn't do "-vcodec copy" automatically.

Dear Reindl Harald, Seeing the sarcastic tone of your emails and finishing your emails with "case closed" when someone is asking a question and is opening a discussion doesn't make you appear smart, on the contrary actually. Yes, you can always specify "-vcodec copy" when you need to, that is not

[FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

Let's say you have a video file encoded with high bitrate with the ultra-fast preset in H.264 because you couldn't afford CPU at that time. Now you have a huge file mostly because it was encoded quickly. You are now two days later with access to a good CPU and GPU. If you re-encode that file to s

Re: [FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

What about using a hash to check your existing against your possibly new / possibly matching file. If it's a match don't run ffmpeg on it. Assuming i'm understanding what you're trying to achieve, it would seem better practice not to touch the file with ffmpeg when you can avoid it. > On Sep

[FFmpeg-user] [freezedetect filter] discard frozen frames option ever added?

I'm trying to remove frozen frames from a video with gaps in the input stream, and the freezedetect filter appears to accurately find/list those sections. I was hoping to use the results of freezedetect to trim those sections of video, and there was a freezedetect "discard" ("f") option in the dev

Re: [FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

I'm not sure I understand what you mean, do you mean a hash like md5 and sha1? Could you please elaborate and simplify a bit? On Sat, Sep 30, 2023 at 7:51 PM MediaMouth wrote: > What about using a hash to check your existing against your possibly new / > possibly matching file. If it's a match

Re: [FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

вс, 1 окт. 2023 г., 02:43 Stéphane Archer : > Let's say you have a video file encoded with high bitrate with the > ultra-fast preset in H.264 because you couldn't afford CPU at that time. > Now you have a huge file mostly because it was encoded quickly. > > You are now two days later with access t

Re: [FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

> On Sep 30, 2023, at 17:47, Stéphane Archer wrote: > > I'm not sure I understand what you mean, do you mean a hash like md5 and > sha1? > Could you please elaborate and simplify a bit? I checked-- I was referencing this from your OP > Is there any good reason why FFmpeg which sees that the v

Re: [FFmpeg-user] How do you keep all video metadata when transcoding using ffmpeg?

Consider - Always retaining camera originals - Extracting the metadata using ffmpeg and maybe exiftool and capturing that either in matching-named sidecar files and/or in a media asset manager. > On Sep 29, 2023, at 04:46, Stéphane Archer wrote: > > This includes: > > - > >

Re: [FFmpeg-user] Is there a way to re-encode an inefficiently encoded file without losing quality and reducing file size?

Every time you transcode, you lose more quality, same as making a VHS to VHS tape copy. If space is an issue, buy a Series 40 nVidia card that supports AV1 encoding. Transcode your blu-ray source directly to AV1 for the smallest file at the highest quality. True lossless file sizes are FAR lar