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ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument #5563

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opened 2026-02-21 02:52:40 -05:00 by deekerman · 7 comments

deekerman commented

2026-02-21 02:52:40 -05:00

Owner

Originally created by @horaceho on GitHub (Sep 15, 2015).

$ youtube-dl -U
youtube-dl is up-to-date (2015.09.09)

$ youtube-dl 'https://www.youtube.com/watch?v=ShttAt5xtto'
[youtube] ShttAt5xtto: Downloading webpage
[youtube] ShttAt5xtto: Downloading video info webpage
[youtube] ShttAt5xtto: Extracting video information
[youtube] ShttAt5xtto: Downloading DASH manifest
[youtube] ShttAt5xtto: Downloading DASH manifest
[download] HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm has already been downloaded
[download] 100% of 900.79MiB
[download] HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm has already been downloaded
[download] 100% of 65.12MiB
[ffmpeg] Merging formats into "HUMAN Extended version VOL.2-ShttAt5xtto.webm"
ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

$ youtube-dl 'https://www.youtube.com/watch?v=ShttAt5xtto' --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'https://www.youtube.com/watch?v=ShttAt5xtto', u'--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.09.09
[debug] Python version 2.7.9 - Linux-3.2.40-armv7l-with-glibc2.4
[debug] exe versions: ffmpeg 2.0.2
[debug] Proxy map: {}
[youtube] ShttAt5xtto: Downloading webpage
[youtube] ShttAt5xtto: Downloading video info webpage
[youtube] ShttAt5xtto: Extracting video information
[youtube] ShttAt5xtto: Downloading DASH manifest
[youtube] ShttAt5xtto: Downloading DASH manifest
[debug] Invoking downloader on 'https://r1---sn-i3co-i3bd.googlevideo.com/videoplayback?id=4a1b6d02de71b6da&itag=248&source=youtube&requiressl=yes&ms=au&pcm2cms=yes&mm=31&mn=sn-i3co-i3bd&mv=m&pl=21&ratebypass=yes&mime=video/webm&gir=yes&clen=944543539&lmt=1441841852526088&dur=5177.480&key=dg_yt0&fexp=9408710,9409069,9409207,9412514,9415365,9415436,9415485,9416023,9416053,9416126,9416328,9416515,9416729,9417353,9417437,9417707,9417950,9418153,9418251,9418392,9418448,9419444,9419785,9419966,9420078,9420348,9420798&mt=1442308997&sver=3&signature=45FB403676510E0B6886DA88D27C63C881340CB3.540FFF30882B8C506FD459CF6DFEE6770BE9CC23&upn=ZjRbWDTslC8&ip=119.247.7.132&ipbits=0&expire=1442330650&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,pcm2cms,mm,mn,mv,pl,ratebypass,mime,gir,clen,lmt,dur'
[download] HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm has already been downloaded
[download] 100% of 900.79MiB
[debug] Invoking downloader on u'https://r1---sn-i3co-i3bd.googlevideo.com/videoplayback?ip=119.247.7.132&pcm2cms=yes&keepalive=yes&gir=yes&id=o-AH8n28L2u1ZuDJHgmZXKjxPAdxkzNplzYIzXc9YZrX1F&sver=3&sparams=clen%2Cdur%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpcm2cms%2Cpl%2Crequiressl%2Csource%2Cupn%2Cexpire&mn=sn-i3co-i3bd&mm=31&upn=7xvAvYj6Rm0&pl=21&mv=m&mt=1442308997&ms=au&signature=A8D31DCAD35D206F4BF3032CCFD8D7B219C0612E.4F4A86C0A31790525F7B074B6AE07E74227C3EE8&source=youtube&expire=1442330649&clen=68285477&itag=251&requiressl=yes&initcwndbps=3497500&ipbits=0&mime=audio%2Fwebm&key=yt5&lmt=1441834869777536&dur=5177.521&fexp=9408710%2C9409069%2C9409207%2C9412514%2C9415365%2C9415436%2C9415485%2C9416023%2C9416053%2C9416126%2C9416328%2C9416515%2C9416729%2C9417353%2C9417437%2C9417707%2C9417950%2C9418153%2C9418251%2C9418392%2C9418448%2C9419444%2C9419785%2C9419966%2C9420078%2C9420348%2C9420798&ratebypass=yes'
[download] HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm has already been downloaded
[download] 100% of 65.12MiB
[ffmpeg] Merging formats into "HUMAN Extended version VOL.2-ShttAt5xtto.webm"
[debug] ffmpeg command line: ffmpeg -y -i 'HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm' -i 'HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm' -c copy -map 0:v:0 -map 1:a:0 'HUMAN Extended version VOL.2-ShttAt5xtto.temp.webm'
ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Traceback (most recent call last):
  File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/YoutubeDL.py", line 1704, in post_process
    files_to_delete, info = pp.run(info)
  File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 403, in run
    self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
  File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 151, in run_ffmpeg_multiple_files
    raise FFmpegPostProcessorError(msg)
FFmpegPostProcessorError

Originally created by @horaceho on GitHub (Sep 15, 2015). ``` $ youtube-dl -U youtube-dl is up-to-date (2015.09.09) $ youtube-dl 'https://www.youtube.com/watch?v=ShttAt5xtto' [youtube] ShttAt5xtto: Downloading webpage [youtube] ShttAt5xtto: Downloading video info webpage [youtube] ShttAt5xtto: Extracting video information [youtube] ShttAt5xtto: Downloading DASH manifest [youtube] ShttAt5xtto: Downloading DASH manifest [download] HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm has already been downloaded [download] 100% of 900.79MiB [download] HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm has already been downloaded [download] 100% of 65.12MiB [ffmpeg] Merging formats into "HUMAN Extended version VOL.2-ShttAt5xtto.webm" ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument $ youtube-dl 'https://www.youtube.com/watch?v=ShttAt5xtto' --verbose [debug] System config: [] [debug] User config: [] [debug] Command-line args: [u'https://www.youtube.com/watch?v=ShttAt5xtto', u'--verbose'] [debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8 [debug] youtube-dl version 2015.09.09 [debug] Python version 2.7.9 - Linux-3.2.40-armv7l-with-glibc2.4 [debug] exe versions: ffmpeg 2.0.2 [debug] Proxy map: {} [youtube] ShttAt5xtto: Downloading webpage [youtube] ShttAt5xtto: Downloading video info webpage [youtube] ShttAt5xtto: Extracting video information [youtube] ShttAt5xtto: Downloading DASH manifest [youtube] ShttAt5xtto: Downloading DASH manifest [debug] Invoking downloader on 'https://r1---sn-i3co-i3bd.googlevideo.com/videoplayback?id=4a1b6d02de71b6da&itag=248&source=youtube&requiressl=yes&ms=au&pcm2cms=yes&mm=31&mn=sn-i3co-i3bd&mv=m&pl=21&ratebypass=yes&mime=video/webm&gir=yes&clen=944543539&lmt=1441841852526088&dur=5177.480&key=dg_yt0&fexp=9408710,9409069,9409207,9412514,9415365,9415436,9415485,9416023,9416053,9416126,9416328,9416515,9416729,9417353,9417437,9417707,9417950,9418153,9418251,9418392,9418448,9419444,9419785,9419966,9420078,9420348,9420798&mt=1442308997&sver=3&signature=45FB403676510E0B6886DA88D27C63C881340CB3.540FFF30882B8C506FD459CF6DFEE6770BE9CC23&upn=ZjRbWDTslC8&ip=119.247.7.132&ipbits=0&expire=1442330650&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,pcm2cms,mm,mn,mv,pl,ratebypass,mime,gir,clen,lmt,dur' [download] HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm has already been downloaded [download] 100% of 900.79MiB [debug] Invoking downloader on u'https://r1---sn-i3co-i3bd.googlevideo.com/videoplayback?ip=119.247.7.132&pcm2cms=yes&keepalive=yes&gir=yes&id=o-AH8n28L2u1ZuDJHgmZXKjxPAdxkzNplzYIzXc9YZrX1F&sver=3&sparams=clen%2Cdur%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpcm2cms%2Cpl%2Crequiressl%2Csource%2Cupn%2Cexpire&mn=sn-i3co-i3bd&mm=31&upn=7xvAvYj6Rm0&pl=21&mv=m&mt=1442308997&ms=au&signature=A8D31DCAD35D206F4BF3032CCFD8D7B219C0612E.4F4A86C0A31790525F7B074B6AE07E74227C3EE8&source=youtube&expire=1442330649&clen=68285477&itag=251&requiressl=yes&initcwndbps=3497500&ipbits=0&mime=audio%2Fwebm&key=yt5&lmt=1441834869777536&dur=5177.521&fexp=9408710%2C9409069%2C9409207%2C9412514%2C9415365%2C9415436%2C9415485%2C9416023%2C9416053%2C9416126%2C9416328%2C9416515%2C9416729%2C9417353%2C9417437%2C9417707%2C9417950%2C9418153%2C9418251%2C9418392%2C9418448%2C9419444%2C9419785%2C9419966%2C9420078%2C9420348%2C9420798&ratebypass=yes' [download] HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm has already been downloaded [download] 100% of 65.12MiB [ffmpeg] Merging formats into "HUMAN Extended version VOL.2-ShttAt5xtto.webm" [debug] ffmpeg command line: ffmpeg -y -i 'HUMAN Extended version VOL.2-ShttAt5xtto.f248.webm' -i 'HUMAN Extended version VOL.2-ShttAt5xtto.f251.webm' -c copy -map 0:v:0 -map 1:a:0 'HUMAN Extended version VOL.2-ShttAt5xtto.temp.webm' ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument Traceback (most recent call last): File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/YoutubeDL.py", line 1704, in post_process files_to_delete, info = pp.run(info) File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 403, in run self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args) File "/var/services/homes/ohho//tool/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 151, in run_ffmpeg_multiple_files raise FFmpegPostProcessorError(msg) FFmpegPostProcessorError ```

deekerman closed this issue

2026-02-21 02:52:43 -05:00

deekerman commented

2026-02-21 02:52:46 -05:00

Author

Owner

@dstftw commented on GitHub (Sep 15, 2015):

Update ffmpeg.

@dstftw commented on GitHub (Sep 15, 2015): Update ffmpeg.

deekerman commented

2026-02-21 02:52:47 -05:00

Author

Owner

@jbergknoff commented on GitHub (Oct 12, 2015):

There seems to have been a change between 2015.08.28 to 2015.09.03. From these logs, it looks like the change involved preferring webm audio over m4a audio.

2015.09.03 failure

$ youtube-dl -f bestvideo[ext=mp4]+bestaudio --prefer-ffmpeg --merge-output-format mp4 --verbose https://www.youtube.com/watch?v=pmCkoAWArcE
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-f', u'bestvideo[ext=mp4]+bestaudio', u'--prefer-ffmpeg', u'--merge-output-format', u'mp4', u'--verbose', u'https://www.youtube.com/watch?v=pmCkoAWArcE']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2015.09.03
[debug] Python version 2.7.10 - Linux-3.16.0-29-generic-x86_64-with
[debug] exe versions: ffmpeg 2.8, ffprobe 2.8
[debug] Proxy map: {}
[youtube] pmCkoAWArcE: Downloading webpage
[youtube] pmCkoAWArcE: Downloading video info webpage
[youtube] pmCkoAWArcE: Extracting video information
[youtube] pmCkoAWArcE: Downloading DASH manifest
[youtube] pmCkoAWArcE: Downloading DASH manifest
[debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=137&source=youtube&requiressl=yes&mm=31&mn=sn-q4fl6ne7&pl=20&mv=m&ms=au&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&ratebypass=yes&mime=video/mp4&gir=yes&clen=83187324&lmt=1443936229003830&dur=274.065&mt=1444662397&key=dg_yt0&fexp=9407157,9408213,9408710,9409069,9412857,9414764,9416126,9417707,9418203,9418448,9419786,9419886,9420348,9420718,9421013,9421523,9421544,9421606,9421745,9422362&signature=7B017859C2F91726FBBF5C1CEAFA829CE692F9B8.863A6D4F7C183585AEFA13919F21AF82F6926149&sver=3&upn=noXOHhH9N8w&ip=70.122.244.227&ipbits=0&expire=1444684077&sparams=ip,ipbits,expire,id,itag,source,requiressl,mm,mn,pl,mv,ms,nh,ratebypass,mime,gir,clen,lmt,dur'
[download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4
[download] 100% of 79.33MiB in 00:1437MiB/s ETA 00:000
[debug] Invoking downloader on u'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?pl=20&upn=iQb6JR41Wr8&ipbits=0&mm=31&gir=yes&mn=sn-q4fl6ne7&id=o-ANaIepztiWhHN179-ZIEIZ6wUxbhpJ9hO-tTHIILI1F6&ip=70.122.244.227&initcwndbps=1577500&source=youtube&signature=7EE3050E3C88A6D7856E36C3D1CB0F2CF3F8BC79.8F7C32CD4B44288D1FD97611A8437E1BBB461D8A&mt=1444662397&mv=m&ms=au&lmt=1443952144949430&clen=4417768&keepalive=yes&dur=274.081&mime=audio%2Fwebm&key=yt6&sparams=clen%2Cdur%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cnh%2Cpcm2%2Cpl%2Crequiressl%2Csource%2Cupn%2Cexpire&expire=1444684077&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&fexp=9407157%2C9408213%2C9408710%2C9409069%2C9412857%2C9414764%2C9416126%2C9417707%2C9418203%2C9418448%2C9419786%2C9419886%2C9420348%2C9420718%2C9421013%2C9421523%2C9421544%2C9421606%2C9421745%2C9422362&sver=3&requiressl=yes&pcm2=yes&itag=251&ratebypass=yes'
[download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f251.webm
[download] 100% of 4.21MiB in 00:0022MiB/s ETA 00:005
[ffmpeg] Merging formats into "Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.mp4"
[debug] ffmpeg command line: ffmpeg -y -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4' -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f251.webm' -c copy -map 0:v:0 -map 1:a:0 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.temp.mp4'
ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/youtube_dl/YoutubeDL.py", line 1699, in post_process
    files_to_delete, info = pp.run(info)
  File "/usr/lib/python2.7/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 403, in run
    self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
  File "/usr/lib/python2.7/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 151, in run_ffmpeg_multiple_files
    raise FFmpegPostProcessorError(msg)
FFmpegPostProcessorError

2015.08.28 success

$ youtube-dl -f bestvideo[ext=mp4]+bestaudio --prefer-ffmpeg --merge-output-format mp4 --verbose https://www.youtube.com/watch?v=pmCkoAWArcE
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-f', u'bestvideo[ext=mp4]+bestaudio', u'--prefer-ffmpeg', u'--merge-output-format', u'mp4', u'--verbose', u'https://www.youtube.com/watch?v=pmCkoAWArcE']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2015.08.28
[debug] Python version 2.7.10 - Linux-3.16.0-29-generic-x86_64-with
[debug] exe versions: ffmpeg 2.8, ffprobe 2.8
[debug] Proxy map: {}
[youtube] pmCkoAWArcE: Downloading webpage
[youtube] pmCkoAWArcE: Downloading video info webpage
[youtube] pmCkoAWArcE: Extracting video information
[youtube] pmCkoAWArcE: Downloading DASH manifest
[youtube] pmCkoAWArcE: Downloading DASH manifest
[debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=137&source=youtube&requiressl=yes&ms=au&mv=m&mn=sn-q4fl6ne7&mm=31&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&pl=20&ratebypass=yes&mime=video/mp4&gir=yes&clen=83187324&lmt=1443936229003830&dur=274.065&sver=3&mt=1444662397&fexp=9406004,9408710,9409069,9414764,9415436,9416126,9416837,9417707,9417814,9418199,9418394,9418448,9418999,9419065,9419309,9419785,9420328,9420348,9420500,9421013,9421133,9421655,9421801,9421923&signature=02DCA9308EF805A5AA1DFB965715C607DC6584AE.2BBE49681FCBA02C4B70909233C3A69DF0CB496B&upn=3PxNWNQTAYc&key=dg_yt0&ip=70.122.244.227&ipbits=0&expire=1444684149&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,mv,mn,mm,nh,pl,ratebypass,mime,gir,clen,lmt,dur'
[download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4
[download] 100% of 79.33MiB in 00:1690MiB/s ETA 00:000
[debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=140&source=youtube&requiressl=yes&ms=au&mv=m&mn=sn-q4fl6ne7&mm=31&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&pl=20&ratebypass=yes&mime=audio/mp4&gir=yes&clen=4355012&lmt=1443936130938067&dur=274.134&sver=3&mt=1444662397&fexp=9406004,9408710,9409069,9414764,9415436,9416126,9416837,9417707,9417814,9418199,9418394,9418448,9418999,9419065,9419309,9419785,9420328,9420348,9420500,9421013,9421133,9421655,9421801,9421923&signature=754C4B3074C5A4C7FDE8892EC47966730CE87FA9.0DEBC48447769467D6C80C61F6E6E6784A334D43&upn=3PxNWNQTAYc&key=dg_yt0&ip=70.122.244.227&ipbits=0&expire=1444684149&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,mv,mn,mm,nh,pl,ratebypass,mime,gir,clen,lmt,dur'
[download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a
[download] 100% of 4.15MiB in 00:0005MiB/s ETA 00:005
[ffmpeg] Merging formats into "Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.mp4"
[debug] ffmpeg command line: ffmpeg -y -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4' -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a' -c copy -map 0:v:0 -map 1:a:0 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.temp.mp4'
Deleting original file Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4 (pass -k to keep)
Deleting original file Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a (pass -k to keep)

@jbergknoff commented on GitHub (Oct 12, 2015): There seems to have been a change between 2015.08.28 to 2015.09.03. From these logs, it looks like the change involved preferring `webm` audio over `m4a` audio. ### 2015.09.03 failure ``` $ youtube-dl -f bestvideo[ext=mp4]+bestaudio --prefer-ffmpeg --merge-output-format mp4 --verbose https://www.youtube.com/watch?v=pmCkoAWArcE [debug] System config: [] [debug] User config: [] [debug] Command-line args: [u'-f', u'bestvideo[ext=mp4]+bestaudio', u'--prefer-ffmpeg', u'--merge-output-format', u'mp4', u'--verbose', u'https://www.youtube.com/watch?v=pmCkoAWArcE'] [debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8 [debug] youtube-dl version 2015.09.03 [debug] Python version 2.7.10 - Linux-3.16.0-29-generic-x86_64-with [debug] exe versions: ffmpeg 2.8, ffprobe 2.8 [debug] Proxy map: {} [youtube] pmCkoAWArcE: Downloading webpage [youtube] pmCkoAWArcE: Downloading video info webpage [youtube] pmCkoAWArcE: Extracting video information [youtube] pmCkoAWArcE: Downloading DASH manifest [youtube] pmCkoAWArcE: Downloading DASH manifest [debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=137&source=youtube&requiressl=yes&mm=31&mn=sn-q4fl6ne7&pl=20&mv=m&ms=au&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&ratebypass=yes&mime=video/mp4&gir=yes&clen=83187324&lmt=1443936229003830&dur=274.065&mt=1444662397&key=dg_yt0&fexp=9407157,9408213,9408710,9409069,9412857,9414764,9416126,9417707,9418203,9418448,9419786,9419886,9420348,9420718,9421013,9421523,9421544,9421606,9421745,9422362&signature=7B017859C2F91726FBBF5C1CEAFA829CE692F9B8.863A6D4F7C183585AEFA13919F21AF82F6926149&sver=3&upn=noXOHhH9N8w&ip=70.122.244.227&ipbits=0&expire=1444684077&sparams=ip,ipbits,expire,id,itag,source,requiressl,mm,mn,pl,mv,ms,nh,ratebypass,mime,gir,clen,lmt,dur' [download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4 [download] 100% of 79.33MiB in 00:1437MiB/s ETA 00:000 [debug] Invoking downloader on u'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?pl=20&upn=iQb6JR41Wr8&ipbits=0&mm=31&gir=yes&mn=sn-q4fl6ne7&id=o-ANaIepztiWhHN179-ZIEIZ6wUxbhpJ9hO-tTHIILI1F6&ip=70.122.244.227&initcwndbps=1577500&source=youtube&signature=7EE3050E3C88A6D7856E36C3D1CB0F2CF3F8BC79.8F7C32CD4B44288D1FD97611A8437E1BBB461D8A&mt=1444662397&mv=m&ms=au&lmt=1443952144949430&clen=4417768&keepalive=yes&dur=274.081&mime=audio%2Fwebm&key=yt6&sparams=clen%2Cdur%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cnh%2Cpcm2%2Cpl%2Crequiressl%2Csource%2Cupn%2Cexpire&expire=1444684077&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&fexp=9407157%2C9408213%2C9408710%2C9409069%2C9412857%2C9414764%2C9416126%2C9417707%2C9418203%2C9418448%2C9419786%2C9419886%2C9420348%2C9420718%2C9421013%2C9421523%2C9421544%2C9421606%2C9421745%2C9422362&sver=3&requiressl=yes&pcm2=yes&itag=251&ratebypass=yes' [download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f251.webm [download] 100% of 4.21MiB in 00:0022MiB/s ETA 00:005 [ffmpeg] Merging formats into "Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.mp4" [debug] ffmpeg command line: ffmpeg -y -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4' -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f251.webm' -c copy -map 0:v:0 -map 1:a:0 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.temp.mp4' ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/youtube_dl/YoutubeDL.py", line 1699, in post_process files_to_delete, info = pp.run(info) File "/usr/lib/python2.7/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 403, in run self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args) File "/usr/lib/python2.7/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 151, in run_ffmpeg_multiple_files raise FFmpegPostProcessorError(msg) FFmpegPostProcessorError ``` ### 2015.08.28 success ``` $ youtube-dl -f bestvideo[ext=mp4]+bestaudio --prefer-ffmpeg --merge-output-format mp4 --verbose https://www.youtube.com/watch?v=pmCkoAWArcE [debug] System config: [] [debug] User config: [] [debug] Command-line args: [u'-f', u'bestvideo[ext=mp4]+bestaudio', u'--prefer-ffmpeg', u'--merge-output-format', u'mp4', u'--verbose', u'https://www.youtube.com/watch?v=pmCkoAWArcE'] [debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8 [debug] youtube-dl version 2015.08.28 [debug] Python version 2.7.10 - Linux-3.16.0-29-generic-x86_64-with [debug] exe versions: ffmpeg 2.8, ffprobe 2.8 [debug] Proxy map: {} [youtube] pmCkoAWArcE: Downloading webpage [youtube] pmCkoAWArcE: Downloading video info webpage [youtube] pmCkoAWArcE: Extracting video information [youtube] pmCkoAWArcE: Downloading DASH manifest [youtube] pmCkoAWArcE: Downloading DASH manifest [debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=137&source=youtube&requiressl=yes&ms=au&mv=m&mn=sn-q4fl6ne7&mm=31&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&pl=20&ratebypass=yes&mime=video/mp4&gir=yes&clen=83187324&lmt=1443936229003830&dur=274.065&sver=3&mt=1444662397&fexp=9406004,9408710,9409069,9414764,9415436,9416126,9416837,9417707,9417814,9418199,9418394,9418448,9418999,9419065,9419309,9419785,9420328,9420348,9420500,9421013,9421133,9421655,9421801,9421923&signature=02DCA9308EF805A5AA1DFB965715C607DC6584AE.2BBE49681FCBA02C4B70909233C3A69DF0CB496B&upn=3PxNWNQTAYc&key=dg_yt0&ip=70.122.244.227&ipbits=0&expire=1444684149&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,mv,mn,mm,nh,pl,ratebypass,mime,gir,clen,lmt,dur' [download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4 [download] 100% of 79.33MiB in 00:1690MiB/s ETA 00:000 [debug] Invoking downloader on 'https://r6---sn-q4fl6ne7.googlevideo.com/videoplayback?id=a660a4a00580adc1&itag=140&source=youtube&requiressl=yes&ms=au&mv=m&mn=sn-q4fl6ne7&mm=31&nh=IgpwcjAxLmRmdzA2KgkxMjcuMC4wLjE&pl=20&ratebypass=yes&mime=audio/mp4&gir=yes&clen=4355012&lmt=1443936130938067&dur=274.134&sver=3&mt=1444662397&fexp=9406004,9408710,9409069,9414764,9415436,9416126,9416837,9417707,9417814,9418199,9418394,9418448,9418999,9419065,9419309,9419785,9420328,9420348,9420500,9421013,9421133,9421655,9421801,9421923&signature=754C4B3074C5A4C7FDE8892EC47966730CE87FA9.0DEBC48447769467D6C80C61F6E6E6784A334D43&upn=3PxNWNQTAYc&key=dg_yt0&ip=70.122.244.227&ipbits=0&expire=1444684149&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,mv,mn,mm,nh,pl,ratebypass,mime,gir,clen,lmt,dur' [download] Destination: Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a [download] 100% of 4.15MiB in 00:0005MiB/s ETA 00:005 [ffmpeg] Merging formats into "Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.mp4" [debug] ffmpeg command line: ffmpeg -y -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4' -i 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a' -c copy -map 0:v:0 -map 1:a:0 'Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.temp.mp4' Deleting original file Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f137.mp4 (pass -k to keep) Deleting original file Vivolytics pitches at REACH NeXT 2015-pmCkoAWArcE.f140.m4a (pass -k to keep) ```

deekerman commented

2026-02-21 02:52:47 -05:00

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@dstftw commented on GitHub (Oct 12, 2015):

@jbergknoff since c9afb51cea quality metadata for formats that have no such metadata in DASH manifest is extracted from an alternative source. In your particular case, bitrate of best audio format (251) is now recognized and correctly accepted as bestaudio. Since you force --merge-output-format to mp4 (note that mp4 + webm can't be merged into mp4 container) then it's solely your responsibility to properly select bestaudio like you do for bestvideo.

@dstftw commented on GitHub (Oct 12, 2015): @jbergknoff since c9afb51ceaeae7cbd74502e0451eb9163a1ab7fb quality metadata for formats that have no such metadata in DASH manifest is extracted from an alternative source. In your particular case, bitrate of best audio format (251) is now recognized and correctly accepted as `bestaudio`. Since you force `--merge-output-format` to `mp4` (note that `mp4` + `webm` can't be merged into `mp4` container) then it's solely your responsibility to properly select `bestaudio` like you do for `bestvideo`.

deekerman commented

2026-02-21 02:52:47 -05:00

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@jbergknoff commented on GitHub (Oct 12, 2015):

@dstftw ah, thank you very much for the explanation.

@jbergknoff commented on GitHub (Oct 12, 2015): @dstftw ah, thank you very much for the explanation.

deekerman commented

2026-02-21 02:52:47 -05:00

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@ralyodio commented on GitHub (Jul 26, 2016):

@dstftw how do you properly select bestaudio?

I'm still getting this error:

$ youtube-dl -f bestvideo[ext=mp4]+bestaudio 'https://www.youtube.com/watch?v=LIC0_fDp1Xw' -o "%(autonumber)s-%(title)s.%(ext)s" --merge-output-format mp4
[youtube] LIC0_fDp1Xw: Downloading webpage
[youtube] LIC0_fDp1Xw: Downloading video info webpage
[youtube] LIC0_fDp1Xw: Extracting video information
[youtube] LIC0_fDp1Xw: Downloading MPD manifest
[download] Destination: 00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.f136.mp4
[download] 100% of 7.42MiB in 00:00
[download] Destination: 00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.f251.webm
[download] 100% of 357.52KiB in 00:00
[ffmpeg] Merging formats into "00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.mp4"
ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

@ralyodio commented on GitHub (Jul 26, 2016): @dstftw how do you properly select `bestaudio`? I'm still getting this error: ``` $ youtube-dl -f bestvideo[ext=mp4]+bestaudio 'https://www.youtube.com/watch?v=LIC0_fDp1Xw' -o "%(autonumber)s-%(title)s.%(ext)s" --merge-output-format mp4 [youtube] LIC0_fDp1Xw: Downloading webpage [youtube] LIC0_fDp1Xw: Downloading video info webpage [youtube] LIC0_fDp1Xw: Extracting video information [youtube] LIC0_fDp1Xw: Downloading MPD manifest [download] Destination: 00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.f136.mp4 [download] 100% of 7.42MiB in 00:00 [download] Destination: 00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.f251.webm [download] 100% of 357.52KiB in 00:00 [ffmpeg] Merging formats into "00001-Lightning Strike Hits Pole in Chicago. July 24th 2016.mp4" ERROR: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument ```

deekerman commented

2026-02-21 02:52:47 -05:00

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@yan12125 commented on GitHub (Jul 26, 2016):

For https://www.youtube.com/watch?v=LIC0_fDp1Xw, bestaudio selects webm (itag 251). This is not compatible with an MP4 container. The solution is forcing m4a audios:

youtube-dl -v -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]' 'https://www.youtube.com/watch?v=LIC0_fDp1Xw' -o "%(autonumber)s-%(title)s.%(ext)s" --merge-output-format mp4

@yan12125 commented on GitHub (Jul 26, 2016): For https://www.youtube.com/watch?v=LIC0_fDp1Xw, bestaudio selects webm (itag 251). This is not compatible with an MP4 container. The solution is forcing m4a audios: ``` youtube-dl -v -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]' 'https://www.youtube.com/watch?v=LIC0_fDp1Xw' -o "%(autonumber)s-%(title)s.%(ext)s" --merge-output-format mp4 ```

deekerman commented

2026-02-21 02:52:47 -05:00

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@lakhman commented on GitHub (Jun 22, 2017):

Just had this error, the issue was using an old version of ffmpeg.
I (perhaps like many others) had ffmpeg installed via homebrew on Mac.

A simple brew upgrade ffmpeg fixed this. Hope this helps someone!

@lakhman commented on GitHub (Jun 22, 2017): Just had this error, the issue was using an old version of `ffmpeg`. I _(perhaps like many others)_ had ffmpeg installed via homebrew on Mac. A simple `brew upgrade ffmpeg` fixed this. Hope this helps someone!

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