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VLC Video Conversion
Have latest VLC on Win 7 Pro.
I Want to convert multiple Videos into a .MP4. I load the videos. Multiple videos as it allows. Set the conversion to .MP4 and start VLC converting. Use the append -converted to the filename After each conversion it says I have to choose Keep or Overwrite. It will NOT accept KEEP so only Overwrite is available. When done, I only have ONE conversion. I tried KEEP after each file of the multiple group. This is NOT multiple conversions if I have to interact for each file. Then not be able to get each file converted. Only one file seem to be converted. So what is going on ? Anybody use VLC for multiple file conversions ? How is it done ? --- news://freenews.netfront.net/ - complaints: --- |
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#2
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VLC Video Conversion
Also the 600 MByte file converted to 1.1 MByte and is only the first few
seconds of the original file. What is up with that. The conversion took a very long time to convert 600 MByte to a bad 1.1 MByte file. Something very wrong with VLC ! --- news://freenews.netfront.net/ - complaints: --- |
#3
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VLC Video Conversion
OGER wrote:
Have latest VLC on Win 7 Pro. I Want to convert multiple Videos into a .MP4. I load the videos. Multiple videos as it allows. Set the conversion to .MP4 and start VLC converting. Use the append -converted to the filename After each conversion it says I have to choose Keep or Overwrite. It will NOT accept KEEP so only Overwrite is available. When done, I only have ONE conversion. I tried KEEP after each file of the multiple group. This is NOT multiple conversions if I have to interact for each file. Then not be able to get each file converted. Only one file seem to be converted. So what is going on ? Anybody use VLC for multiple file conversions ? How is it done ? The FFMPEG program allows both conversion and concatenation. And it does exactly what you tell it to do, because it is "command line" programming at its finest. To concatenate files with FFMPEG, you give a filelist.txt ffmpeg -f concat -r 30000/1001 -i filelist.txt -c copy N:\concattest2.avi --- fix bogus rate The rate is approximately 29.97 FPS. My filelist.txt apparently looked like this. Twelve videos. file 'G:\WORK\a00.avi' file 'G:\WORK\a01.avi' file 'G:\WORK\a02.avi' file 'G:\WORK\a03.avi' file 'G:\WORK\a04.avi' file 'G:\WORK\a05.avi' file 'G:\WORK\a06.avi' file 'G:\WORK\a07.avi' file 'G:\WORK\a08.avi' file 'G:\WORK\a09.avi' file 'G:\WORK\a10.avi' file 'G:\WORK\a11.avi' Conversion looks like this: ffmpeg -i somevideo.mp4 -vcodec cinepak -acodec pcm_s16le G:\WORK\a00.avi Each command must be carefully crafted. You write them down to save time, the next time. What you're doing is video editing, and you could pop several videos into a video editor as segments, then "output" to a new format. Whether this is a good thing to do, depends on whether the segments all came from the same recording device. Or, they're some horrible cobbled together mess of various resolutions, frame rates, standards, and so on. The only time I've done "concat", it was because the source material all came from the original large video file. I only cut it into 12 pieces to speed up some conversion process. Paul |
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VLC Video Conversion
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#5
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VLC Video Conversion
My files are from Windows Media Center Recorded TV and can be 8+
GigaBytes Long. No concatenations is desired. |
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VLC Video Conversion
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#7
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VLC Video Conversion
OGER wrote:
My files are from Windows Media Center Recorded TV and can be 8+ GigaBytes Long. No concatenations is desired. Have you tried HandBrake ? I think it supports NVenc (NVidia) and perhaps VCE (AMD). Since your desired output is MP4, that might go faster. FFMPEG supports the Windows Media Center format. The lineup inside the recording can be slightly complicated, like around 5 "items" on one channel, and 4 "items" on a second TV channel. In this example, the player program is asked to select Audio Stream 2 and Video Stream 3, then play at 704x480. So HandBrake has to figure this out somehow too. ffplay -ast 2 -vst 3 -x 704 -y 480 some.wtv FFMPEG cannot handle encrypted .wtv - content which is marked as "Do Not Copy" could be recorded that way. So far, using OTA antenna and DTV recording card, all my captures have been viewable (so no encryption). https://en.wikipedia.org/wiki/HandBrake https://handbrake.fr/ This is a sample run. I need to work on this, since it should be maybe 3x faster. This version of the program doesn't use NVdec for decoding. https://i.postimg.cc/yxN4rR2B/handbrake-wtv-mp4-run.gif Paul |
#8
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VLC Video Conversion
Paul wrote:
OGER wrote: My files are from Windows Media Center Recorded TV and can be 8+ GigaBytes Long. No concatenations is desired. Have you tried HandBrake ? I think it supports NVenc (NVidia) and perhaps VCE (AMD). Since your desired output is MP4, that might go faster. FFMPEG supports the Windows Media Center format. The lineup inside the recording can be slightly complicated, like around 5 "items" on one channel, and 4 "items" on a second TV channel. In this example, the player program is asked to select Audio Stream 2 and Video Stream 3, then play at 704x480. So HandBrake has to figure this out somehow too. ffplay -ast 2 -vst 3 -x 704 -y 480 some.wtv FFMPEG cannot handle encrypted .wtv - content which is marked as "Do Not Copy" could be recorded that way. So far, using OTA antenna and DTV recording card, all my captures have been viewable (so no encryption). https://en.wikipedia.org/wiki/HandBrake https://handbrake.fr/ This is a sample run. I need to work on this, since it should be maybe 3x faster. This version of the program doesn't use NVdec for decoding. https://i.postimg.cc/yxN4rR2B/handbrake-wtv-mp4-run.gif Paul So Handbrake uses the video encoder on my video card, at 92FPS. If I use FFMPEG, I can use both the NVDec to decode the WTV source. As well as NVEnc to make the MP4. The frame processing rate jumps to 208FPS (7x real time). This is for 1920x1080 movie content. ffmpeg -hwaccel nvdec -i "test.wtv" -y -acodec copy -vcodec h264_nvenc -crf 23 "test.mp4" The source file is 7,868,514,304 bytes. The output file is 1,214,804,182 bytes. The content is about 1 hour long, and the conversion finishes in 60/7 = 8.6 minutes. The video card draws around 60W of electricity. The CPU is mostly idle (unlike the Handbrake case where the CPU is railed). https://i.postimg.cc/fRRWSvXv/ffmpeg-nvdec-nvenc.gif Paul |
#9
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VLC Video Conversion
What are the resulting videos like ? What are the differences from the
original ? e.g. motion blur, sound quality etc ? Paul, given your one-liners, I think I can see that by writing a small app I can fully automate conversion of multiple files. I will take less time to write the app than the time to enter a one-liner and all the time overhead to do each file. So thanks, I will give it a try. Strange that VLC is non-functional in this area what with its huge following. --- news://freenews.netfront.net/ - complaints: --- |
#10
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VLC Video Conversion
What are the resulting videos like ? What are the differences from the
original ? e.g. motion blur, sound quality etc ? Paul, given your one-liners, I think I can see that by writing a small app I can fully automate conversion of multiple files. I will take less time to write the app than the time to enter a one-liner and all the time overhead to do each file. So thanks, I will give it a try. Strange that VLC is non-functional in this area what with its huge following. |
#11
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VLC Video Conversion
OGER wrote:
What are the resulting videos like ? What are the differences from the original ? e.g. motion blur, sound quality etc ? Paul, given your one-liners, I think I can see that by writing a small app I can fully automate conversion of multiple files. I will take less time to write the app than the time to enter a one-liner and all the time overhead to do each file. So thanks, I will give it a try. Strange that VLC is non-functional in this area what with its huge following. As it turns out, I found a thread after I posted that, which said the default bitrate of the NVEnc doesn't change as a function of resolution and other choices. So the reason my output file was 1GB, was probably because I didn't set the bitrate higher. There is a parameter you can pass, to set the bitrate. And I've certainly used that while playing around with DVD conversions. I normally expect such a conversion to be about half the size. If you dial the knobs down too much (to the 1GB file I got), that's probably too much loss. As at least some people, expect the output to look the same as the input, when the file is half-sized. I didn't have a problem viewing the 1GB file. No macroblocks or visual artifacts of that sort. The first thing I'm testing for, is whether there's both an audio and a video track, and that I didn't screw that part up. Paul |
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