Waveform generation using ffmpeg filters
Hello. I'm trying to generate a 440 Hz sound with the help of FFmpeg of ffmpeg -f lavfi -i "sine=frequency=440:duration=5" test.wav type, but the waveform is: https://www.datafilehost.com/d/ea27d7ec Does Cinelerra incorrectly process the generation, or do I need to change something in the settings? Ugin.
Ugin, GG says that using F_aeval is easier. Because F_sine "sine function seems to restart at every frame buffer". A screen shot of the set up is at: https://www.datafilehost.com/d/d218ffdb For aeval, note the playback buffer sample. And in case you can not see the png file, you will see with the aeval setup, the default is 440 + something else, so remove the something else to get just the 440. gg/Phyllis I'm trying to generate a 440 Hz sound with the help of FFmpeg of ffmpeg
-f lavfi -i "sine=frequency=440:duration=5" test.wav type, but the waveform is: https://www.datafilehost.com/d/ea27d7ec Does Cinelerra incorrectly process the generation, or do I need to change something in the settings?
Ugin. -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Yes, all right. Thank you. I have not figured out yet how to connect both channels - left and right, but this business is solved. -- Ugin. 13.04.2019 17:47, Phyllis Smith пишет:
Ugin, GG says that using F_aeval is easier. Because F_sine "sine function seems to restart at every frame buffer". A screen shot of the set up is at:
https://www.datafilehost.com/d/d218ffdb
For aeval, note the playback buffer sample. And in case you can not see the png file, you will see with the aeval setup, the default is 440 + something else, so remove the something else to get just the 440. gg/Phyllis
To close the question, here’s an option how to generate a 440 Hz tone for 2 channels: https://www.datafilehost.com/d/d67b7b18 -- Ugin. 13.04.2019 17:47, Phyllis Smith пишет:
Ugin, GG says that using F_aeval is easier. Because F_sine "sine function seems to restart at every frame buffer". A screen shot of the set up is at:
https://www.datafilehost.com/d/d218ffdb
For aeval, note the playback buffer sample. And in case you can not see the png file, you will see with the aeval setup, the default is 440 + something else, so remove the something else to get just the 440. gg/Phyllis
Very nice layout with the different windows of Cinelerra, also interesting how to use this effect. Thanks for sharing. Sam On 15.04.19 12:38, [email protected] wrote:
To close the question, here’s an option how to generate a 440 Hz tone for 2 channels: https://www.datafilehost.com/d/d67b7b18 -- Ugin.
13.04.2019 17:47, Phyllis Smith пишет:
Ugin, GG says that using F_aeval is easier. Because F_sine "sine function seems to restart at every frame buffer". A screen shot of the set up is at:
https://www.datafilehost.com/d/d218ffdb
For aeval, note the playback buffer sample. And in case you can not see the png file, you will see with the aeval setup, the default is 440 + something else, so remove the something else to get just the 440. gg/Phyllis
To close the question, here’s an option how to generate a 440 Hz tone for 2 channels: https://www.datafilehost.com/d/d67b7b18 -- Ugin.
Ugin, if you want there is an alternative, without rendering. Take a look at: https://streamable.com/ohuof So it can be more flexible to change the frequency when you want, if you needed. Audio1 is the master and it is shared with Audio2. Then you can change only the seetings of the effect on Audio1; Audio2 effect is "child" of Audio1. IgorBeg
Yes, I tried this alternative and I liked it. Thank's! -- Ugin. 15.04.2019 19:50, Igor BEGHETTO пишет:
Ugin, if you want there is an alternative, without rendering. Take a look at: https://streamable.com/ohuof So it can be more flexible to change the frequency when you want, if you needed. Audio1 is the master and it is shared with Audio2. Then you can change only the seetings of the effect on Audio1; Audio2 effect is "child" of Audio1.
IgorBeg
participants (4)
-
Igor BEGHETTO -
Phyllis Smith -
preobraz＠gmail.com -
Sam