Kdenlive/Manual/Optagelse

Optagelse

Kdenlive giver mulighed for optagelse af video fra eksterne enheder - Firewire, FFmpeg, skærmoptagelse og Blackmagic.

Du konfigurerer videooptagelse i Indstillinger -> Indstil Kdenlive -> Optagelse (mere om det her).

Du definerer stedet, hvor dine optagelser skal gemmes i Indstillinger -> Indstil Kdenlive -> Miljø -> Standardmapper (mere om det her).

For at udføre en optagelse går du til Optagemonitoren og vælger optageenheden fra drop-ned-listen nederst til højre.

Firewire

Dette optager video fra enheder forbundet via et firewire (også kendt som IEEE 1394 High Speed Serial Bus) kort og kabel.

Capture options are

DV RAW
DV AVI Type 1
DV AVI Type 2
HDV

The first three are quality wise the same (exactly the same DV 25Mb/s standard definition codec), just packed differently into the file. Type 2 seems to be the most widely supported by other applications.

The raw format contains just the plain video frames (with audio interleaved) without any additional information . Raw is useful for some Linux software. Files in this format can also be played with Windows QuickTime when renamed to file.dv .

AVI files may contain multiple streams. Typically, they include one video and one audio stream. The native DV stream format already includes the audio interleaved into its video stream. A type 1 DV AVI file only includes one DV video stream where the audio must be extracted from the DV video stream. A type 2 DV AVI file includes a separate audio stream in addition to the audio data already interleaved in the DV video stream. Therefore, the type 2 DV AVI file is redundant and consumes more space.

HDV is a high-definition format used on tape-based HD camcorders.

This functionality uses dvgrab

FFmpeg

Jeg tror, at dette optager video fra et installeret webcam ved hjælp af Video4Linux2.

Skærmoptagelse

Dette optager en video fra computerens skærm ved hjælp af recordMyDesktop. Der er et uløst problem med denne funktion - se fejlrapporten 2643

In version 0.9.3 the Screen grab is done by the ffmpeg functionality instead. For screen capture to work in ver 0.9.3 the version of ffmpeg installed needs to have been compiled with the --enable-x11grab option. Ubuntu comes with an ffmpeg compiled with this option.

To check on your linux distro type "ffmpeg -version" in a terminal and look for --enable-x11grab in the reported configuration info. ^[1]

If you are capturing screen and using the X246 with audio settings and you get a crash as shown in the screen shot ...

... then consider creating a profile for audio capture where -acodec pcm_s16le is replaced by -acodec libvorbis -b 320k. See Configure Kdnelive

Blackmagic

Dette er til optagelse fra Blackmagics decklink videooptagelseskort (så vidt jeg ved). Jeg er ikke sikker på, hvor stabil denne funktion er i øjeblikket. Se fejlrapporten 2130.

Footnotes

↑ There are two branches of ffmpeg now a Libav branch and a ffmpeg.org branch. The ffmpeg version from the later reports the configuration when you run with "ffmpeg -version". The Libav version does not. So this method to check for the --enable-x11grab does not work if you have libav version of ffmpeg.

[1] There are two branches of ffmpeg now a Libav branch and a ffmpeg.org branch. The ffmpeg version from the later reports the configuration when you run with "ffmpeg -version". The Libav version does not. So this method to check for the --enable-x11grab does not work if you have libav version of ffmpeg.

[1]