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解决image - FFmpeg First 2 Seconds of Video Not Showing

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This code works fine for some audio files (makes a slideshow of JPG pictures with a PNG watermark and MP3 audio, while maintaining aspect ratio) but for this audio file, the pictures are not showing for the first two seconds or so of the video:

ffmpeg -y -framerate 1/12 -i "media/%03d.jpg" -i "media/audio.mp3" -loop 1 -i "media/watermark.png" -filter_complex "[0:v]scale=iw*min(3840/iw\,2160/ih):ih*min(3840/iw\,2160/ih), pad=3840:2160:(3840-iw)/2:(2160-ih)/2[ss]; [ss][2:v] overlay=main_w-overlay_w-10:main_h-overlay_h-10:shortest=1[out]" -map "[out]" -map 1:a -c:v libx264 -r 24 -preset veryfast -tune stillimage -pix_fmt yuv420p -c:a copy -map_metadata -1 "media/video.mkv" -report

I tried converting the audio into different formats of MP3, tried changing bitrates, changed audio to stereo, and even tried converting it to a WAV. None of these things worked.

Here are the report results for when I run this command.

If it makes a difference, I'm using Ubuntu 14.04 and FFmpeg version N-77455-g4707497 (latest version).

image audio video ffmpeg mp4
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  this question
asked Jan 18 '16 at 7:15 Pamela 362 2 17 1   Try with -fflags +genpts as an output option. –  Mulvya Jan 18 '16 at 7:44 1   Take the audio out of the equation. Remove -i "media/audio.mp3", -map 1:a and -c:a copy –  Mulvya Jan 18 '16 at 7:58 1   Sorry. Now that the audio is out, the overlay inputs are [ss][1:v] –  Mulvya Jan 18 '16 at 8:14 1   Run ffprobe media/video.mkv -report and ffprobe -show_packets media/video.mkv > frames.txt and paste those files. –  Mulvya Jan 18 '16 at 8:27 1   Ok, add the audio back in, and add fps=24 before the first [ss] –  Mulvya Jan 18 '16 at 8:44  |  show more comments

1 Answers
1

解决方法

This command should work, but I consider this bizarre behaviour as FFmpeg should be automatically padding frames as per output spec

ffmpeg -y -framerate 1/12 -i "media/%03d.jpg" -i "media/audio.mp3" -loop 1 -i "media/watermark.png" -filter_complex "[0:v]scale=iw*min(3840/iw\,2160/ih):ih*min(3840/iw\,2160/ih), pad=3840:2160:(3840-iw)/2:(2160-ih)/2,fps=24[ss]; [ss][2:v] overlay=main_w-overlay_w-10:main_h-overlay_h-10:shortest=1[out]" -map "[out]" -map 1:a -c:v libx264 -r 24 -preset veryfast -tune stillimage -pix_fmt yuv420p -c:a copy -map_metadata -1 "media/video.mkv"

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  this answer
answered Jan 18 '16 at 8:56 Mulvya 10.6k 1 4 23

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