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  • 0 posts edited
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1d
comment What factors influence how much of an online video people will watch?
Just some food for thought at this link, especially the Wistia analytics: thenextweb.com/socialmedia/2014/05/02/…
Jul
28
comment ffmpeg to cut intro and replace with new intro
Please post stream info for both files. You can get that by running 'ffprobe -i filename.ext'. It also appears near the top of the ffmpeg console output.
Jul
25
comment ffmpeg encoded videos are not playing on mobile browser
Doesn't seem to be that issue as non-encoded videos are playing fine, and if those videos were uniformly non-MP4, the OP would have noticed.
Jul
20
comment After Effects stroke effect doesn't play
Your Stroke effect is not shown as enabled in the screenshot at Graphic Design. It is, right?
Jul
20
comment How can I reduce the size of a webm to 2MB?
You can also check by setting a low b:v and trying various crf values. When the CRF value leads to a solution lower than b:v, that's the resultant bitrate, otherwise it's close to the b:v
Jul
20
comment How can I reduce the size of a webm to 2MB?
We're talking about WebM here. Please refer to this sentence in the ffmpeg guide I linked to in my answer: "there's a constant quality mode (like in the x264 encoder) that will ensure that every frame gets the number of bits it deserves to achieve a certain quality level, rather than forcing the stream to have an average bit rate. This results in better overall quality and should be your method of choice when you encode video with libvpx. In this case, the target bitrate becomes the maximum allowed bitrate."
Jul
19
comment How can I reduce the size of a webm to 2MB?
With CRF specified, b:v is treated as the max allowable bitrate, not the target bitrate.
Jul
18
comment Taking video from a DVD & Making it Editable
Well, I'd suggest the next option would have been to download ffmpeg for Mac and remux the VOBs into a MPEG PS container. There's no recompression that way and it's much quicker.
Jul
17
comment Taking video from a DVD & Making it Editable
VTS_01_1.VOB through VTS01_5.VOB is the video itself. It's in 5 files because the DVD spec requires the files be no larger than 1GiB. Try loading those files in Premiere.
Jul
16
comment FFmpeg : Error occurred while encoding audio stream from ac3 to aac
ffmpeg has to be compiled with fdk. Your build apparently isn't. Use the native encoder with a higher bitrate, so "-strict experimental -c:a aac -b:a 384k" in place of "-codec:a libvo_aacenc -b:a 128k" in your original command.
Jul
16
comment FFmpeg : Error occurred while encoding audio stream from ac3 to aac
Your source audio is 448kbps in 6 channels i.e. ~75kbps per channel, and your target codec is AAC (a lossy codec), so it won't be lossless. Most you can do is increase the target bitrate to something like 192k or higher from 128k. You'll, of course, lose the channel separation from 6 to 2.
Jul
15
comment FFmpeg : Error occurred while encoding audio stream from ac3 to aac
Try adding -a:c 2 after -b:a 128k
Jul
11
comment How to encode video to profile high using ffmpeg?
Answer posted. Glad it worked out.
Jul
11
comment How to encode video to profile high using ffmpeg?
There you go. the ffmpeg build you have uses libx264 compiled for 10-bit. Apparently one can only build with support for either 8-bit OR 10-bit. So, you'll need a build where libx264 supports 8-bit. Now, the archive that you downloaded includes separate ffmpeg builds for both 8-bit and 10-bit. Can you confirm if you aren't actually running the 10-bit version. And if the build compiler has made a mistake, just download the latest iteration.
Jul
10
comment How to encode video to profile high using ffmpeg?
Ok. Run "ffmpeg -h encoder=libx264 > x264.txt" and paste the line from that textfile starting with 'Supported pixel formats'
Jul
10
comment How to encode video to profile high using ffmpeg?
Try ffmpeg -i 50_Cent...mp4 -c:v libx264 -crf 23 -profile:v high -pix_fmt yuv420p -c:a copy arvind34.mp4 2> log.txt --- and paste log.txt here
Jul
10
comment How to encode video to profile high using ffmpeg?
Can you post the entire command you used? And also the output of "ffprobe -i <yourinputfile>"
Jul
10
comment How to encode video to profile high using ffmpeg?
Like the error message says, use "-pix_fmt yuv420p" and place it after "-profile:v high"
Jul
9
comment Losing audio in re-encoding with ffmpeg
And to redirect to a file suffix "2> logfile.txt" to your command like this "ffmpeg -i ..... -y <output> 2> logfile.txt".
Jul
9
comment Losing audio in re-encoding with ffmpeg
1) add a '-t 5' after -i <filename>. The console output should be small enough for complete capture. 2) if that's too big, run ffprobe -i <filename> 3) your audio bitrate is roughly 384 kbps. Seems like AC-3 6 ch. I'm not too sure, but I don't think ISO MP4 container takes AC-3. You may have to encode audio to AAC.