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Collections - Formulaire de création rapide
19 février 2013, par
Mis à jour : Février 2013
Langue : français
Type : Image
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Sur d’autres sites (3529)
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.avi file to .webm file with alpha channel
2 juin 2023, par CutestI have no idea how to use FFmpeg, but my .avi file is too large for a 2-second video ? Any idea how I can convert it to WebM ? While retaining its alpha channel ?


I tried this :


ffmpeg -i "1.avi" -c:v libvpx -pix_fmt yuva420p "1.webm"


Output showed :


ffmpeg version 4.4-essentials_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
 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
 libswscale 5. 9.100 / 5. 9.100
 libswresample 3. 9.100 / 3. 9.100
 libpostproc 55. 9.100 / 55. 9.100
[avi @ 00000245f2e7d640] Stream #0: not enough frames to estimate rate; consider increasing probesize
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from '1.avi':
 Duration: 00:00:02.00, start: 0.000000, bitrate: 3983150 kb/s
 Stream #0:0: Video: rawvideo, bgra, 1920x1080, 4014784 kb/s, 60 fps, 60 tbr, 60 tbn, 60 tbc
 Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> vp8 (libvpx))
 Stream #0:1 -> #0:1 (pcm_s16le (native) -> opus (libopus))
Press [q] to stop, [?] for help
[libvpx @ 00000245f2e8ecc0] v1.10.0-24-g8b3e575a4
[libvpx @ 00000245f2e8ecc0] Neither bitrate nor constrained quality specified, using default CRF of 32 and bitrate of 256kbit/sec
[libvpx @ 00000245f2e8ecc0] Transparency encoding with auto_alt_ref does not work
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


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FFMPEG- Could not write header for output file #0 (incorrect codec parameters ?) : Operation not permitted Error initializing output stream 0:2 —
30 septembre 2021, par DannyHello guys I am trying to create a web-dash manifest for VOD with ffmpeg, but I am getting this error
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permitted Error initializing output stream 0:2 --while using vp9 codec and doesn't understand the error and how to resolve it. Can someone help me out ? If I use vp8 instead of vp9 codec, I get the same error, but the ffmpeg log doesn't show any error.

subprocess.call([
 FFMPEG_PATH,
 "-f", "webm_dash_manifest", "-i", 480p_path,
 "-f", "webm_dash_manifest", "-i", 720p_path,
 "-f", "webm_dash_manifest", "-i", audio_path,
 "-c", "copy", "-map", "0", "-map", "1", "-map", "2",
 "-adaptation_sets", "id=0, streams=0,1, id=1, streams=2",
 "-f", "webm_dash_manifest", dash_path
 ])


Thanks in advance


UPDATE :
This is from the ffmpeg log.


ffmpeg version 2021-09-27-git-b786bc7433-full_build-www.gyan.dev 
Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 7.100 / 57. 7.100
 libavcodec 59. 9.101 / 59. 9.101
 libavformat 59. 5.100 / 59. 5.100
 libavdevice 59. 0.101 / 59. 0.101
 libavfilter 8. 9.100 / 8. 9.100
 libswscale 6. 1.100 / 6. 1.100
 libswresample 4. 0.100 / 4. 0.100
 libpostproc 56. 0.100 / 56. 0.100
Trailing option(s) found in the command: may be ignored.
[webm_dash_manifest @ 000002242a67e500] Could not find codec parameters for stream 0 (Video: vp9, none(tv, bt709, progressive), 854x480): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, webm_dash_manifest, from '480p.webm':
 Metadata:
 HANDLER : Created by Tester
 MAJOR_BRAND : isom
 MINOR_VERSION : 512
 COMPATIBLE_BRANDS: isomiso2avc1mp41
 HW : 1
 :
 BITRATE : 4000000
 :
 COMMENT : vid:v09044240000bq2bmhglths5sm54mgk0
 COPYRIGHT : 638e55167a0287a903e7b6895ed5d02e
 MAXRATE : 15000000
 :
 TE_IS_REENCODE : 1
 :
 ENCODER : Lavf59.2.101
 Duration: 00:00:20.17, bitrate: 907 kb/s
 Stream #0:0: Video: vp9, none(tv, bt709, progressive), 854x480, SAR 1:1 DAR 427:240, 30 fps, 30 tbr, 1k tbn (default)
 Metadata:
 HANDLER_NAME : VideoHandler
 VENDOR_ID : [0][0][0][0]
 ENCODER : Lavc59.1.100 libvpx-vp9
 DURATION : 00:00:20.166000000
 webm_dash_manifest_duration: 20166
 webm_dash_manifest_initialization_range: 1008
 webm_dash_manifest_file_name: 480p.webm
 webm_dash_manifest_track_number: 1
 webm_dash_manifest_cues_start: 2286344
 webm_dash_manifest_cues_end: 2286441
 webm_dash_manifest_bandwidth: 862822
 webm_dash_manifest_cluster_keyframe: 1
 webm_dash_manifest_cue_timestamps: 0,5000,10000,15000,20000
[webm_dash_manifest @ 000002242a69b840] Could not find codec parameters for stream 0 (Video: vp9, none(tv, bt709, progressive), 1280x720): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #1, webm_dash_manifest, from '720p.webm':
 Metadata:
 HANDLER : Created by Tester
 MAJOR_BRAND : isom
 MINOR_VERSION : 512
 COMPATIBLE_BRANDS: isomiso2avc1mp41
 HW : 1
 :
 BITRATE : 4000000
 :
 COMMENT : vid:v09044240000bq2bmhglths5sm54mgk0
 COPYRIGHT : 638e55167a0287a903e7b6895ed5d02e
 MAXRATE : 15000000
 :
 TE_IS_REENCODE : 1
 :
 ENCODER : Lavf59.2.101
 Duration: 00:00:20.17, bitrate: 1548 kb/s
 Stream #1:0: Video: vp9, none(tv, bt709, progressive), 1280x720, SAR 1:1 DAR 16:9, 30 fps, 30 tbr, 1k tbn (default)
 Metadata:
 HANDLER_NAME : VideoHandler
 VENDOR_ID : [0][0][0][0]
 ENCODER : Lavc59.1.100 libvpx-vp9
 DURATION : 00:00:20.166000000
 webm_dash_manifest_duration: 20166
 webm_dash_manifest_initialization_range: 1008
 webm_dash_manifest_file_name: 720p.webm
 webm_dash_manifest_track_number: 1
 webm_dash_manifest_cues_start: 3903085
 webm_dash_manifest_cues_end: 3903182
 webm_dash_manifest_bandwidth: 1473835
 webm_dash_manifest_cluster_keyframe: 1
 webm_dash_manifest_cue_timestamps: 0,5000,10000,15000,20000
Input #2, webm_dash_manifest, from 'audio.webm':
 Metadata:
 HANDLER : Created by Tester
 MAJOR_BRAND : isom
 MINOR_VERSION : 512
 COMPATIBLE_BRANDS: isomiso2avc1mp41
 HW : 1
 :
 BITRATE : 4000000
 :
 COMMENT : vid:v09044240000bq2bmhglths5sm54mgk0
 COPYRIGHT : 638e55167a0287a903e7b6895ed5d02e
 MAXRATE : 15000000
 :
 TE_IS_REENCODE : 1
 :
 ENCODER : Lavf59.2.101
 Duration: 00:00:20.16, bitrate: 118 kb/s
 Stream #2:0: Audio: vorbis, 44100 Hz, stereo, fltp (default)
 Metadata:
 HANDLER_NAME : SoundHandler
 VENDOR_ID : [0][0][0][0]
 ENCODER : Lavc59.1.100 libvorbis
 DURATION : 00:00:20.158000000
 webm_dash_manifest_duration: 20158
 webm_dash_manifest_initialization_range: 5244
 webm_dash_manifest_file_name: audio.webm
 webm_dash_manifest_track_number: 1
 webm_dash_manifest_cues_start: 298527
 webm_dash_manifest_cues_end: 298624
 webm_dash_manifest_bandwidth: 110530
 webm_dash_manifest_cluster_keyframe: 1
 webm_dash_manifest_cue_timestamps: 0,4994,9983,14978,19971
At least one output file must be specified


The command for converting videos and audio to specific resolutions run without issues.


FFMPEG command directly run in cli.


ffmpeg -f webm_dash_manifest -i 480p.webm -f webm_dash_manifest -i 720p.webm -f webm_dash_manifest -i audio.webm -c copy -map 0 -map 1 -map 2 -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1 id=1,streams=2 my_manifest.mpd


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FFmpeg Pydub Debugging/Conversion Failed, ffmpeg returned error code : 1
21 juillet 2021, par Draco

I have a simple line of code importing an mp3 file, it used to give me a WinError2 error which I fixed by adding the ffmpeg exe's into the script directory. But now I have another error which I cannot really make heads or tails of :


The lines of code :


AudioSegment.converter = r"path/to/directory/ffmpeg.exe"


AudioSegment.ffprobe = r"path/to/directory/ffprobe.exe"


imported_mp3 = AudioSegment.from_mp3(Path(file_path))


The error message :


Traceback (most recent call last):
 File "C:\Users\my_user\OneDrive\Desktop\DIR\project.py", line 673, in <module>
 main()
 File "C:\Users\my_user\OneDrive\Desktop\DIR\project.py", line 665, in main
 read_titles(txt_path)
 File "C:\Users\my_user\OneDrive\Desktop\DIR\project.py", line 588, in the_function
 temp_voice = AudioSegment.from_mp3(import_path)
 File "C:\Users\my_user\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pydub\audio_segment.py", line 796, in from_mp3
 return cls.from_file(file, 'mp3', parameters=parameters)
 File "C:\Users\my_user\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pydub\audio_segment.py", line 773, in from_file
 raise CouldntDecodeError(
pydub.exceptions.CouldntDecodeError: Decoding failed. ffmpeg returned error code: 1

Output from ffmpeg/avlib:

ffmpeg version 2021-07-14-git-ca56299fb3-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.3.0 (Rev2, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 0.100 / 57. 0.100
 libavcodec 59. 3.101 / 59. 3.101
 libavformat 59. 4.100 / 59. 4.100
 libavdevice 59. 0.100 / 59. 0.100
 libavfilter 8. 0.103 / 8. 0.103
 libswscale 6. 0.100 / 6. 0.100
 libswresample 4. 0.100 / 4. 0.100
 libpostproc 56. 0.100 / 56. 0.100
[mp3float @ 000001bf73e87b80] Header missing
 Last message repeated 27 times
[mp3 @ 000001bf73e7e540] decoding for stream 0 failed
[mp3 @ 000001bf73e7e540] Could not find codec parameters for stream 0 (Audio: mp3 (mp3float), 0 channels, fltp): unspecified frame size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mp3, from 'C:\Users\my_user\0.mp3':
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #0:0: Audio: mp3, 0 channels, fltp
Stream mapping:
 Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[mp3float @ 000001bf73e90f80] Header missing
Error while decoding stream #0:0: Invalid data found when processing input
[abuffer @ 000001bf73e9b240] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
 Last message repeated 3 times
[abuffer @ 000001bf73e9b240] Error setting option time_base to value 1/0.
[graph_0_in_0_0 @ 000001bf73e9c2c0] Error applying options to the filter.
Error reinitializing filters!
Error while filtering: Result too large
Finishing stream 0:0 without any data written to it.
[abuffer @ 000001bf73e9d4c0] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
 Last message repeated 3 times
[abuffer @ 000001bf73e9d4c0] Error setting option time_base to value 1/0.
[graph_0_in_0_0 @ 000001bf73eaa0c0] Error applying options to the filter.
Error configuring filter graph
Conversion failed!
</module>



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