I am new to ffmpeg and trying to figure out how to convert .MOD files to any generally readable format.
So far I was trying to
ffmpeg -i MOV00A.MOD -vcodec libx264 -acodec aac out.mp4
Result video is readable and has correct ratio aspect is correct but with artefacts like those horizontal lines:
My guess is that I might be using wrong codec but I do not understand which one to choose ?
Running ffmprobe on .MOD results:
ffprobe version 5.1.2 Copyright (c) 2007-2022 the FFmpeg developers
built with Apple clang version 14.0.0 (clang-1400.0.29.202)
configuration: --prefix=/usr/local/Cellar/ffmpeg/5.1.2_4 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, mpeg, from 'MOV00A.MOD':
Duration: 00:00:41.28, start: 0.262222, bitrate: 5285 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn
Side data:
cpb: bitrate max/min/avg: 9286000/0/0 buffer size: 1835008 vbv_delay: N/A
Stream #0:1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 256 kb/s
Related
I'm trying to scale my input video to standard 1280x720 resolution, but my output looks blurred when compared to the input.
FFMPEG CMD
ffmpeg -i input.webm -filter_complex "[0:v] scale=1280.0:720.0 [v0]" -map [v0] output.webm
Input File FFProbe
ffprobe version 4.4.2 Copyright (c) 2007-2021 the FFmpeg developers
built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
configuration: --prefix='/opt/homebrew/Cellar/ffmpeg#4/4.4.2_3' --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-avresample --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, matroska,webm, from 'input.webm':
Metadata:
ENCODER : Lavf58.76.100
Duration: 00:00:20.01, start: 0.000000, bitrate: 1929 kb/s
Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv, bt470bg/bt709/bt709, progressive), 1512x982, SAR 1:1 DAR 756:491, 29.08 fps, 29.08 tbr, 1k tbn, 1k tbc (default)
Metadata:
ENCODER : Lavc58.134.100 libvpx-vp9
DURATION : 00:00:20.011000000
Output File FFProbe
ffprobe version 4.4.2 Copyright (c) 2007-2021 the FFmpeg developers
built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
configuration: --prefix='/opt/homebrew/Cellar/ffmpeg#4/4.4.2_3' --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-avresample --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, matroska,webm, from 'output.webm':
Metadata:
ENCODER : Lavf58.76.100
Duration: 00:00:20.01, start: 0.000000, bitrate: 1699 kb/s
Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv, bt470bg/bt709/bt709, progressive), 1280x720, SAR 1109:1280 DAR 1109:720, 29.08 fps, 29.08 tbr, 1k tbn, 1k tbc (default)
Metadata:
ENCODER : Lavc58.134.100 libvpx-vp9
DURATION : 00:00:20.011000000
Input Video:
Output Video:
I am recording screen capture of my Electron app to a file, as suggested here: Save captured video to file in Electron
It works great, but the file is a “transport stream”. I can play it in Chrome browser, but can’t adjust the time slider.
The suggestion was to use ffmpeg to post-process the file. The simplest, straight-forward command I found is:
ffmpeg -fflags +genpts -i in.webm out.webm
I thought that this simply generates timestamps. However, the out.webm file is 15 times smaller than in.webm! I don’t see any change in the quality. The downside is - the processing takes about the same time as the duration of the video.
Two questions:
Is there any way I can speedup this “timestamping” process?
Can I record a video that is already 15 times smaller in size?
I specify maxFrameRate: 30 when calling webkitGetUserMedia().
Here is the output of that ffmpeg command:
vlad$ ffmpeg -fflags +genpts -i in.webm out.webm
ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, matroska,webm, from 'in.webm':
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 2560x1416, SAR 1:1 DAR 320:177, 1k tbr, 1k tbn, 1k tbc (default)
Metadata:
alpha_mode : 1
Stream mapping:
Stream #0:0 -> #0:0 (vp9 (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
[libvpx-vp9 # 0x7f85f2012600] v1.9.0
[libvpx-vp9 # 0x7f85f2012600] Neither bitrate nor constrained quality specified, using default CRF of 32
Output #0, webm, to 'out.webm':
Metadata:
encoder : Lavf58.45.100
Stream #0:0(eng): Video: vp9 (libvpx-vp9), yuv420p, 2560x1416 [SAR 1:1 DAR 320:177], q=-1--1, 1k fps, 1k tbn, 1k tbc (default)
Metadata:
alpha_mode : 1
encoder : Lavc58.91.100 libvpx-vp9
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 209 fps=5.8 q=0.0 Lsize= 881kB time=00:00:17.81 bitrate= 405.0kbits/s speed=0.494x
video:879kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.231567%
And here is the information on both files from ffprobe:
vlad$ ffprobe in.webm
ffprobe version 4.3.2 Copyright (c) 2007-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, matroska,webm, from 'in.webm':
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 2560x1416, SAR 1:1 DAR 320:177, 1k tbr, 1k tbn, 1k tbc (default)
Metadata:
alpha_mode : 1
and
vlad$ ffprobe out.webm
ffprobe version 4.3.2 Copyright (c) 2007-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, matroska,webm, from 'out.webm':
Metadata:
ENCODER : Lavf58.45.100
Duration: 00:00:17.82, start: 0.000000, bitrate: 405 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 2560x1416, SAR 1:1 DAR 320:177, 1k tbr, 1k tbn, 1k tbc (default)
Metadata:
ALPHA_MODE : 1
ENCODER : Lavc58.91.100 libvpx-vp9
DURATION : 00:00:17.815000000
I am fairly sure your FFmpeg processing isn't exactly what you think it is -- with your command line, particularly with absence of certain explicit switches, FFmpeg will transcode your video and audio at its own discretion, which is why your output file is much smaller -- the data have been re-compressed, with potentially loss of quality.
If you just want to generate the index necessary for the kind of seeking most players do, and avoid the undesired transcoding, the following command line will suffice:
ffmpeg -i <input-file> -codec copy <output-file>
On a minor note, do take into account that without an additional explicit switch to instruct it otherwise, FFmpeg infers the output container format from the output file name extension. I assume both your input and output are WebM, so there isn't any issue in your case. But even if they weren't, re-muxing media into another format of container doesn't have to result in quality loss.
As you can surmise from the command line above, just running FFmpeg without any explicit switch pertaining to "generation of frame time index", causes it to build the index anyway. It will do so with or without transcoding taking place.
P.S. There are some players, like [the now abandoned] MPC-HC, which are able to seek at least some transport streams. I expect it to be able to seek your kind of WebM media. I don't know the exact details on how it actually does the seeking, but if I would guess I'd say it simply does a linear search from some appropriate location in the media (or the very beginning) for a frame matching the time of seek. Much like looking for a row in a database table which doesn't have an index to help with the search predicate.
I have a VOB file holding an MPEG-2 video track with an AC-3 audio track. The video track of that VOB file consists of a single frame, which when played in a DVD player, holds that still frame until the audio track has finished.
How can I (with FFMPEG ideally), loop that frame to make a "normal" video track that lasts for the length of the audio track, rather than just a single frame?
ffmpeg version N-91999-g148a21611d Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20180813
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 19.101 / 56. 19.101
libavcodec 58. 30.100 / 58. 30.100
libavformat 58. 18.102 / 58. 18.102
libavdevice 58. 4.103 / 58. 4.103
libavfilter 7. 32.100 / 7. 32.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, mpeg, from '.\SINGLEFRAME.VOB':
Duration: 00:00:47.94, start: 0.336711, bitrate: 439 kb/s
Stream #0:0: Data: dvd_nav_packet
Stream #0:1: Video: mpeg2video (Main), yuv420p(tv), 720x576 [SAR 16:15 DAR 4:3], 8000 kb/s, 25 tbr, 90k tbn, 50 tbc
Stream #0:2: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
I am trying to cut a small section of a video using the following sentence:
ffmpeg.exe -i video.wmv -ss 00:20:02 -to 00:20:09 -crf 22 "C:\test.mp4" -y
However, ffmpeg hangs showing messages like:
[asf # 03327b00] too long payload 0kB time=00:00:00.00 bitrate=N/A speed= 0x
Last message repeated 352 times
[asf # 03327b00] too long payload 0kB time=00:00:00.00 bitrate=N/A speed= 0x
Last message repeated 331 times
I have waited for more than 30 minutes and ffmpeg did not finish the cutting. Does anyone have any idea how to solve this?
Any suggestion will be appreciated
PD. the ffprobe output of the source file is the following:
ffprobe version N-81831-g97e7f03 Copyright (c) 2007-2016 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. 32.100 / 55. 32.100
libavcodec 57. 60.101 / 57. 60.101
libavformat 57. 51.102 / 57. 51.102
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 63.100 / 6. 63.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 2.100 / 2. 2.100
libpostproc 54. 0.100 / 54. 0.100
[asf # 03b7afe0] too long payload
Last message repeated 159 times
Input #0, asf, from 'F:\video.wmv':
Metadata:
WMFSDKVersion : 11.0.5721.5145
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
DeviceConformanceTemplate: M
Duration: 01:41:25.95, start: 0.000000, bitrate: 1649 kb/s
Stream #0:0(eng): Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 640x480, 1500 kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 128 kb/s
The command I used was :
C:\cmd\ffmpeg\bin\ffmpeg.exe -i "C:\Users\user\Dropbox\Workspace - C#\SnowflakeGenerator\out\out%d.png" -c:v libvpx -b:v 1M "C:\Users\user\Dropbox\Workspace - C#\SnowflakeGenerator\video.webm" -y
The output was:
ffmpeg version N-82889-g54931fd Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --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-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. 43.100 / 55. 43.100
libavcodec 57. 68.100 / 57. 68.100
libavformat 57. 61.100 / 57. 61.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 68.100 / 6. 68.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, image2, from 'C:\Users\yb5243yv\Dropbox\Workspace - C#\SnowflakeGenerator\out\out%d.png':
Duration: 00:00:21.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgba(pc), 1000x1000 [SAR 3779:3779 DAR 1:1], 25 fps, 25 tbr, 25 tbn, 25 tbc
[libvpx # 0000000000be89c0] v1.6.0
[libvpx # 0000000000be89c0] Transparency encoding with auto_alt_ref does not work
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> vp8 (libvpx))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
The error is:
[libvpx # 0000000000be89c0] Transparency encoding with auto_alt_ref does not work
and
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
I'm not sure exactly what is causing the issue, I followed this tutorial, however they did not mention the error. I should mention that I am not using audio, so I left the audio encoder out (I did try it with the audio encoder to make sure, and that was not the problem)
Like the error msg says, Transparency encoding with auto_alt_ref does not work, so
ffmpeg.exe -i "out%d.png" -c:v libvpx -b:v 1M -auto-alt-ref 0 "video.webm" -y