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Maybe a little late but this is because you are running a xuggler library which is compiled for linux and 32 Bit in yout 64 Bit Windows. Try either running your application in Java 32Bit or on a linux os
'!cmd_path -i !videofile -an -pass 1 -vcodec libx264 -vpre slow_firstpass -b 500k -r 29.97 -threads 0 !convertfile','!cmd_path -y -i !videofile -acodec libfaac -ab 128k -pass 2 -vcodec libx264 -vpre slow -b 500k -r 29.97 -threads 0 !convertfile'
'!cmd_path -i !videofile -an -pass 1 -vcodec libx264 -vpre slow_firstpass -b 994k -r 29.97 -threads 0 !convertfile','!cmd_path -y -i !videofile -acodec libfaac -ab 128k -pass 2 -vcodec libx264 -vpre slow -b 994k -r 29.97 -threads 0 !convertfile'
!cmd_path -y -i !videofile -acodec aac -ar 48000 -ab 128k -ac 2 -vcodec libx264 -b 1200k -cmp 256 -subq 7 -trellis 1 -refs 5 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 1200k -maxrate 1200k -bufsize 1200k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 16:9 -r 30 -g 90 !convertfile
Found out that my issues was a little different than the original. In my case, the html5_mp4 preset assumes the machine has a ffmpeg preset 'slow'. Apparently Ubuntu 10.04 does not come with this ffmpeg preset as the text \"File for preset 'slow' not found\" from my error indicates. I now understand that the module has presets and ffmpeg has its own presets as well!
Thanks. There seems to be a problem where the resolution for your first pass command is different from the resolution for your second pass command (\"MB-tree doesn't support different resolution than 1st pass (480x270 vs 480x360)\").
PHPVideoToolkit error: Execute error. It was not possible to encode \"/public_html/drupal/sites/default/files/videos/original/MVI_0572.AVI\" as FFmpeg returned an error. Note, however the error was encountered on the second pass of the encoding process and the first pass appear to go fine. The error is with the video codec of the input file. FFmpeg reports the error to be \"Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height\".
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One of the most common uses I have for ffmpeg is stitching together lots of individual images to create a video. This is useful for, say, outputting plots from Matplotlib or Matlab at regular intervals, then stitching them together into a single video at the end.
--extra-cflags allows you to point the compiler to include files that are not in standard locations (/usr/lib or /usr/local/lib). Useful if the codecs mentioned above are installed to non-standard locations.
When you point ffmpeg to your images, you can't use the usual bash syntax, like ffmpeg -i file*.jpg (the -i is the flag telling ffmpeg which files are the input files). You have to use printf format, like this:
The first is the quality of the video. This assumes you don't care about the final size of the video, you simply want to specify the quality of the final video. This can be done using the -qscale argument. This outputs a video with a quality on the scale of 1 (the very best) to 30 (the very worst).
If you don't specify a quality, the final video can potentially look really bad. Specifying the quality is a good way to check if the quality is bad because of the images you're using, or because of the video encoding process.
Another important option is the framerate. This controls how quickly your movie will progress. I typically use ffmpeg to visualize CFD results, and sometimes I want a slow video. To do this, I can set the framerate with the -r option, and give the value in Hz.
However, if the video is too tall/short or too wide/narrow, the picture will be distorted. If the input file is a video, you just run ffmpeg without specifying an output file or any options. However, if it's an image, you can just open it in any image editor and there should be an option to see what the resolution is.
Let's say we have a series of images that are 1200px x 900px, and we want to make them into a movie that has an aspect ratio of 16:9. The current aspect ratio is 4:3, and we want an aspect ratio of 16:9, so we have to crop the image.
Let's crop it vertically. We should get rid of 225 pixels from the top and bottom, or 112 pixels from the top and 112 pixels from the bottom. The extra pixel is ok because it will only stretch the image by 1 pixel.
The -r option should, in theory, slow down the framerate of the movie. However, the way it does this is pretty stupid. Instead of interpreting -r 10 as 10 frames per second, and thus using 10 images per second, it uses the default 26 frames per second, and just cuts out all but 10 images. So instead of 26 frames per second, it's 26 frames per second with the last 16 frames all being the same image.
So let's say you have 100 images you want to stretch out into slow motion, and you want your video to be twice as slow. Then rename each of the 100 images so their numbers range from 1-200 but are all even (0, 2, 4, 6, 8, etc.). Then, copy image 0 into image 1, image 2 into image 3, and so on. In this way, your frames will show up for twice the amount of time they would have originally.
which will capture a thumbnail image 3 seconds into the video, using \"image2\" as the output format (this works for outputting jpg files, but other formats can be set with the -f option), and grabbing only N frames (set with the -vframes N option). If I wanted to grab 5 frames, and create a different image for each, I could issue the command:
This can also be used in combination with -vframes to limit the number of thumbnails saved. Likewise, the option -t N limits thumbnail capturing to N seconds, or -t HH:MM:SS to limit thumbnail capturing for HH hours, MM minutes, and SS seconds.
What if the length of your video and your audio are different By default, ffmpeg is conservative and doesn't delete anything. The length of the final video will be the length of the longer of the two videos (a three minute video track and a ten minute audio track will result in seven minutes of black screen).
The first thing the command does is provide two inputs with the -i flags. Next, the -filter_complex flag will filter/process/combine the inputs and combine them into a single video. Basically we feed filter complex a string, which contains a command that will combine the videos in some particular way.
The command that is passed to filter_complex starts with [0:v:0] and later has a [1:v:0], where the left side of the v refers to which input, and the right side of the output refers to which output. In this case we have two inputs, so the 0 and 1 refer to maya.mp4 or cronus.mp4, respectively. There is only one output so we probably don't need the :0 at the end, but we add it anyway just to be sure.
We are telling filter complex to pad the first video by doubling it, and then we overlay the second video. There is a bit of magic  happening here, but the [bg] placement tells it which video to put on which side. Finally, we tell the command where to output all of this stuff.
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As you can tell, the D780 and Z6 share a lot of similarities, including important features like their live view implementation and video specifications. Even in many of the places where they differ, not all photographers will agree on which one is preferable (for example, the choice between dual SD cards vs a single XQD has generated a lot of argument).
I'm Spencer Cox, a macro and landscape photographer based in Denver. My photos have been displayed in galleries worldwide, including the Smithsonian Museum of Natural History and exhibitions in London, Malta, Siena, and Beijing. These days I'm active on Instagram and YouTube.
Spencer, Could use some help. So many great choices out there. The more I look the more confused. I will primarily be using it to shot my large landscape paintings as well as landscape reference, video for my channel. Of course price is a issue. The D850 would be great but getting steep. I think I the large mpg , would be best, but maybe I could get away with the Z6 or D780. Any opinions. Also like the idea of a manufacturers warranty. 59ce067264