I am attempting to animate a series of PNG images at 30 frames per second (and add an audio track) with FFmpeg.
On the command line, I specify the input and output frame rates as 30 fps.
ffmpeg.exe -r 30 -i %d.png -itsoffset 0.770 -i soundtrack.wav -r 30 -vcodec mpeg4 -y "ffmpegtest.mp4"
The output shows that it is reading the input images at the default 25 frames per second.
ffmpeg version N-82225-gb4e9252 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 35.100 / 55. 35.100
libavcodec 57. 66.101 / 57. 66.101
libavformat 57. 57.100 / 57. 57.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 66.100 / 6. 66.100
libswscale 4. 3.100 / 4. 3.100
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, image2, from '%d.png':
Duration: 00:02:24.00, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgba(pc), 480x320, 25 fps, 25 tbr, 25 tbn, 25 tbc
[I'll interrupt here to say it is that last line that confuses me]
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'soundtrack.wav':
Duration: 00:06:51.26, bitrate: 1411 kb/s
Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Output #0, mp4, to 'ffmpegtest.mp4':
Metadata:
encoder : Lavf57.57.100
Stream #0:0: Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 480x320, q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc
Metadata:
encoder : Lavc57.66.101 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.66.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> mpeg4 (native))
Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[image2 @ 0000000000622cc0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame= 3600 fps=242 q=19.1 Lsize= 9908kB time=00:06:52.04 bitrate= 197.0kbits/s speed=27.7x
video:3263kB audio:6494kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.540179%
[aac @ 000000000064e600] Qavg: 448.922
I am fairly new to FFmpeg. What am I missing? How do I tell it the input stream is 30 fps?
