[FFmpeg-user] Merging animated gif and mp3

[OldZepHead]

Moritz:
  Thank you for your amazingly detailed response.  Not only did I get the video done, but learned a helluva lot as well :)

  I didn’t intend for anyone to address the list of things I tried, was just hoping to show the path I was going down.  It’s truly appreciated that you took the time to point out the issues with each - definitely learned a lot.  

Thanks again,
JJ

> On Apr 22, 2015, at 4:18 PM, Moritz Barsnick <barsnick at gmx.net> wrote:
> 
> Hi JJ,
> 
> On Wed, Apr 22, 2015 at 11:10:31 -0700, OldZepHead wrote:
>> question, but I have searched this forum (and google) for a couple days and
>> I cant find the answer
> 
> Well, you haven't googled enough. ;-)
> 
> And you didn't read (or post) your ffmpeg outputs. You should have
> gotten a lot of error messages.
> 
>> ./ffmpeg -i Soundtrack.mp3 -i CombinedPics1.mp4 -filter_complex overlay=shortest=1 Merged_out1.mp4
> 
> For one, you used a filter without reading its documentation:
> "Overlay one video on top of another."
> You don't want to do that, so forget this.
> 
>> ./ffmpeg -i Soundtrack.mp3 -i CombinedPics1.mp4 -shortest=1 Merged_out1.flv
> 
> This does the opposite of what you want. It will make the result end
> when the shorter file is over, in this case your video. It will never
> make it loop.
> 
>> ./ffmpeg -i CombinedPics1.gif -loop_input -i Soundtrack.mp3 Merged_out1.mp4
> 
> This only works for image input sequences as handled by the image2
> demuxer (the docs say so, btw), and that doesn't handle gifs, I guess.
> But close! The option is deprecated though. See next:
> 
>> ./ffmpeg -i -loop 1 CombinedPics1.gif -i Soundtrack.mp3 Merged_out1.mp4
> 
> "-loop 1" is the supported syntax for the deprecated "-loop_input".
> Same remark as above.
> 
> The wiki (and stackexchange) give good hints - my first two google
> hits.
> https://trac.ffmpeg.org/wiki/Concatenate#demuxer
> See "You can also loop a video. This example will loop input.mkv 10
> times".
> 
> Due to DTS/PTS issues, I couldn't directly use my animated GIF for an
> arbitrary number of times. What did work was to convert the GIF to a
> (non-looped) H.264 video in the first step, then to loop that using
> "-c[:v] copy". More than one step, sorry, but successful.
> 
> I created the input file for the concat demuxer thus:
> $ perl -e 'print "file animgif.mkv\n" x 10000' > animgif.txt
> thereby looping the input video 10000 times, which makes it significantly
> longer than the audio file I provided.
> 
> Then I created the complete video with audio thus:
> $ ffmpeg -f concat -i animgif.txt -i audiofile.mp3 -map 0 -map 1 -c copy -shortest output.mkv
> 
>> Two thing's I've picked up on from this forum - 1) loop 1/ignore_loop don't
>> act the same way is all ffmpeg builds,
> 
> I don't know what you're trying to say, except what I pointed out: One
> flag is being replaced by another, more useful or intuitive one. They
> do the same thing.
> 
>> and 2) the order of operations and encoding types matter greatly.
> 
> Absolutely.
> 
> Cheers,
> Moritz
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