Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

Am 28.04.2021 um 23:34 schrieb Bo Berglund: On Wed, 28 Apr 2021 11:35:47 +0200, Michael Koch wrote: I had tested this (which I found by googling) before I posted: ffmpeg -i input20.mp4 -filter:a "atempo=1.25" -vn output20.mp4 There were no errors displayed but the resulting file *ONLY* conta

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

On Wed, 28 Apr 2021 23:43:51 +0200, Nicolas George wrote: >You changed the speed of the audio and not the video, what did you >expect? FFmpeg does what you tell it to do, it cannot read your mind. I did NOT want to change the *speed* of neither the audio nor the video! What I wanted was to chang

Re: [FFmpeg-user] Media Express vs FFmpeg CPU use

On 4/28/2021 11:15 PM, Bouke wrote: Can you capture into something else and then transcode? Nah, the whole idea is to be done as fast as possible, so not to transcode… You _have_ to encode (not transcode), the SDI input is raw uncompressed frames ("rawvideo (UYVY / 0x59565955)"); capturing th

Re: [FFmpeg-user] Media Express vs FFmpeg CPU use

> On 28 Apr 2021, at 21:27, Carl Zwanzig wrote: > > On 4/28/2021 3:03 AM, Bouke wrote: >> Trying to capture decklink input to ProRes. >> FFmpeg is VERY cpu hungry (230 % on my sytem in the example below, >> increasing when upping the quality of Prores) >> Media Express / VTEncoderXPCservice use

Re: [FFmpeg-user] Can FFmpeg Record Video On Linux Using V4L2 in V4L2_CAP_VIDEO_CAPTURE_MPLANE Mode?

On Wed, 28. Apr 14:36, Bossert Andrew via ffmpeg-user wrote: > Hi Moritz, > > Thanks for your response. I'm going to try to get the email format right here > but if I don't feel free to yell at me and let me know how it is supposed to > be. > > >> On Wed, Apr 28, 2021 at 13:17:25 +, FFmpeg

[FFmpeg-user] convert a video to some format and than bring it back exactly the same

Hi, When i convert a video for example using this command: *ffmpeg -i bird.avi -c:v copy -c:a copy -y bird.mkv* and then convert it back: *ffmpeg -i bird.mkv -c:v copy -c:a copy -y bird.avi* I see there is a difference in the file size. The first avi is *1462KB* and after the reconversion is *1

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

Bo Berglund (12021-04-28): > OK, that included the video... > But now there is no lip-sync at all. Seems to drift longer apart during the > video playing. Audio and video running at different speeds. You changed the speed of the audio and not the video, what did you expect? FFmpeg does what you te

Re: [FFmpeg-user] Credit Notes (bulk creation)

Great, I found how to do it thanks ¡!! https://vimeo.com/445276018 https://ottverse.com/ffmpeg-drawtext-filter-dynamic-overlays-timecode-scrolling-text-credits/ Enviado desde Correo para Windows 10 De: Carl Zwanzig Enviado:

Re: [FFmpeg-user] FFMPEG

On Wed, 28 Apr 2021 18:08:44 +0200, RZAD wrote: >Hello i got a problem with ffmpeg i need to decrypt SAMPLE-AES but FFMPEG >are not compatble how can do ? >thanks Don't hijack an old existing thread Then: Supply enough info to analyse your problem. -- Bo Berglund Developer in Sweden

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

On Wed, 28 Apr 2021 11:35:47 +0200, Michael Koch wrote: >> I had tested this (which I found by googling) before I posted: >> >> ffmpeg -i input20.mp4 -filter:a "atempo=1.25" -vn output20.mp4 >> >> There were no errors displayed but the resulting file *ONLY* contains the >> audio >> part, I neeed

Re: [FFmpeg-user] Media Express vs FFmpeg CPU use

It's very difficult to figure out with any accuracy because codecs aren't really testable outside the application that's using them, but my impression is that the ffmpeg prores encoder - while very helpful and a massive timesaver - is fairly CPU-hungry compared to the commercial options. P

Re: [FFmpeg-user] Media Express vs FFmpeg CPU use

On 4/28/2021 3:03 AM, Bouke wrote: Trying to capture decklink input to ProRes. FFmpeg is VERY cpu hungry (230 % on my sytem in the example below, increasing when upping the quality of Prores) Media Express / VTEncoderXPCservice use just half the CPU. My assumption is that the BMD code is simpl

Re: [FFmpeg-user] Credit Notes (bulk creation)

On 4/28/2021 9:26 AM, Adrian Perello Marin wrote: Is it possible to do this by command line so that it reads the content of the CSV (video name and credits text) and processes them in a "more or less" automatic way? As Nicolas says, not directly, however it would be a relatively simple script to

Re: [FFmpeg-user] Credit Notes (bulk creation)

Adrian Perello Marin (12021-04-28): > I receive about 100 videos, with a CSV file containing the credits of > the video; and I have to convert the text in each of the videos to > play at the beginning or at the end of the video. Is it possible to do > this by command line so that it reads the conte

[FFmpeg-user] FFMPEG

Hello i got a problem with ffmpeg i need to decrypt SAMPLE-AES but FFMPEG are not compatble how can do ? thanks ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email

[FFmpeg-user] Credit Notes (bulk creation)

Hi, I am not sure if with this tool I can do the following: I receive about 100 videos, with a CSV file containing the credits of the video; and I have to convert the text in each of the videos to play at the beginning or at the end of the video. Is it possible to do this by command line so that

Re: [FFmpeg-user] Can FFmpeg Record Video On Linux Using V4L2 in V4L2_CAP_VIDEO_CAPTURE_MPLANE Mode?

Hi Moritz, Thanks for your response. I'm going to try to get the email format right here but if I don't feel free to yell at me and let me know how it is supposed to be. >> On Wed, Apr 28, 2021 at 13:17:25 +, FFmpeg user discussions wrote: >> $ ffmpeg -f v4l2 -list_formats all -i /dev/video1

Re: [FFmpeg-user] Can FFmpeg Record Video On Linux Using V4L2 in V4L2_CAP_VIDEO_CAPTURE_MPLANE Mode?

Hi Andrew, On Wed, Apr 28, 2021 at 13:17:25 +, FFmpeg user discussions wrote: > $ ffmpeg -f v4l2 -list_formats all -i /dev/video1 # Look at device > information > > $ ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video0 output.mkv > # save the video You'll have to use the same

[FFmpeg-user] Can FFmpeg Record Video On Linux Using V4L2 in V4L2_CAP_VIDEO_CAPTURE_MPLANE Mode?

Hello, I am trying to use FFmpeg to save an Analog Video stream to a file on Linux. My video device is a V4L2 device and I have tried a couple different commands: $ ffmpeg -f v4l2 -list_formats all -i /dev/video1 # Look at device information $ ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -

[FFmpeg-user] Media Express vs FFmpeg CPU use

Trying to capture decklink input to ProRes. FFmpeg is VERY cpu hungry (230 % on my sytem in the example below, increasing when upping the quality of Prores) Media Express / VTEncoderXPCservice use just half the CPU. Is there a way to speed up FFmpeg in a similar way? (Eventually I want to do mult

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

Am 28.04.2021 um 10:53 schrieb Bo Berglund: On Wed, 28 Apr 2021 09:03:26 +0200, Michael Koch wrote: Am 28.04.2021 um 08:51 schrieb Bo Berglund: Sometimes when I download a video it turns out to have some issues that has raised the audio pitch of the video making it not so enjoyable to watch/h

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

On Wed, 28 Apr 2021 09:03:26 +0200, Michael Koch wrote: >Am 28.04.2021 um 08:51 schrieb Bo Berglund: >> Sometimes when I download a video it turns out to have some issues that has >> raised the audio pitch of the video making it not so enjoyable to watch/hear. >> So I wonder if there is an ffmpeg

Re: [FFmpeg-user] Possible to change pitch of audio in a downloaded mp4 file?

Am 28.04.2021 um 08:51 schrieb Bo Berglund: Sometimes when I download a video it turns out to have some issues that has raised the audio pitch of the video making it not so enjoyable to watch/hear. So I wonder if there is an ffmpeg command that can modify the pitch of the audio without changing t