Youtube video gives FFmpegPostProcessorError: Stream #1:0 -> #0:1 (copy)

[aghtragh]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2019.03.01. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2019.03.01

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

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• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=H1H3OgPK48k']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2019.03.01
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17134
[debug] exe versions: ffmpeg N-85266-g1229007
[debug] Proxy map: {}
[youtube] H1H3OgPK48k: Downloading webpage
[youtube] H1H3OgPK48k: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on [...]
[download] Destination: Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-H1H3OgPK48k.f397.mp4
[download] 100% of 1.10MiB in 00:00
[debug] Invoking downloader on [...]
[download] Destination: Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-H1H3OgPK48k.f140.m4a
[download] 100% of 595.99KiB in 00:00
[ffmpeg] Merging formats into "Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-H1H3OgPK48k.mp4"
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-H1H3OgPK48k.f397.mp4" -i "file:Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-
H1H3OgPK48k.f140.m4a" -c copy -map "0:v:0" -map "1:a:0" "file:Elon Musk finds 'dolphin not working' meme hilarious _ Meme Review-H1H3OgPK48k.temp.mp4"
ERROR:   Stream #1:0 -> #0:1 (copy)
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplyslo9xs\build\youtube_dl\YoutubeDL.py", line 2052, in post_process
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplyslo9xs\build\youtube_dl\postprocessor\ffmpeg.py", line 512, in run
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplyslo9xs\build\youtube_dl\postprocessor\ffmpeg.py", line 235, in run_ffmpeg_multiple_files
youtube_dl.postprocessor.ffmpeg.FFmpegPostProcessorError:   Stream #1:0 -> #0:1 (copy)

Description of your issue, suggested solution and other information

Running this command
youtube-dl -v https://www.youtube.com/watch?v=H1H3OgPK48k
gives an ffmpeg error:
youtube_dl.postprocessor.ffmpeg.FFmpegPostProcessorError: Stream #1:0 -> #0:1 (copy)

[dstftw]

Outdated ffmpeg.

[appleton-tom]

There was a similar problem yesterday, see #20083
Youtube has added a new encoding method and old ffmpeg can't deal with it. The video component is encoded with new "AV1" format (av01.0.05M.08).[Note: A-V-ONE, not old AVI]
"Best" used to mean highest resolution, but now might mean 'best encoding' method ??
Use the -F to list all available audio/video formats, the select from that list.

In the example given in the description above no formats were selected so it defaults to "best"
In this case audio is
140 m4a audio only DASH audio 130k , m4a_dash container, mp4a.40.2@128k, 595.99KiB
and video is
397 mp4 854x480 480p 308k , av01.0.05M.08, 24fps, video only, 1.10MiB
The downloads worked, but ffmpeg failed to merge.

22 mp4 1280x720 hd720 341k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)
is actually shown as "best", one download file, audio/video combined

Search on "av01.0.05M.08" to learn more about this new encoding.