Filename truncation should apply on actual filename instead of title (was: FFMPEG chokes on default filename)

Please follow the guide below

You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
Put an x into all the boxes [ ] relevant to your issue (like this: [x])
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Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2017.10.15.1. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

[x] I've verified and I assure that I'm running youtube-dl 2017.10.15.1

Before submitting an issue make sure you have:

[x] At least skimmed through the README, most notably the FAQ and BUGS sections
[x] Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

[x] Bug report (encountered problems with youtube-dl)
[ ] Site support request (request for adding support for a new site)
[ ] Feature request (request for a new functionality)
[ ] Question
[ ] Other

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 ```):

Sanitized output

PS G:\test> .\youtube-dl --cookies '.\cookies.txt' 'https://www.blah.com/video/mnff?manifest=https%3A%2F
%2Fwmvideocdn.streaming.mediaservices.windows.net%2Ffbbcda92-5518-4b65-a0b5-ec3f1a18b81e_prores_out.i
sm%2FManifest%28format%3Dm3u8-aapl%2Caudio-only%3Dfalse%2Cfilter%3Dpreset2%29&token=Bearer%3DeyJ0eXAiOiJKV1QiLCJhbGciOiJ
IUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi
1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI6MTUwOD
M2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0Ei6YC8Zul-WyjaYipqIHevyc-lH7m_sFhte_uPc&idepisode=3672&numero=1&idserie=272' -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--cookies', '.\\cookies.txt', 'https://blah.com/video/mnff?manifest=htt
ps%3A%2F%2Fwmvideocdn.streaming.mediaservices.windows.net%2Ffbbcda92-5518-4b65-a0b5-ec3f1a18b81e_pror
es_out.ism%2FManifest%28format%3Dm3u8-aapl%2Caudio-only%3Dfalse%2Cfilter%3Dpreset2%29&token=Bearer%3DeyJ0eXAiOiJKV1QiLCJ
hbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1ND
EtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cC
I6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0Ei6YC8Zul-WyjaYipqIHevyc-lH7m_sFhte_uPc&idepisode=3672&numero=1&idserie=272
', '-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2017.10.15.1
[debug] Python version 3.4.4 - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-87871-g7480f232d2, ffprobe N-87871-g7480f232d2
[debug] Proxy map: {}
[generic] mnff?manifest=https://wmvideocdn.streaming.mediaservices.windows.net/fbbcda92-5518-4b65-a0b5-ec3f1a18
b81e/_prores_out.ism/Manifest(format=m3u8-aapl,audio-only=false,filter=preset2)&token=Bearer=eyJ0eXAiOiJKV1QiLCJh
bGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDE
tODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI
6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ: Requesting header
[generic] mnff?manifest=https://wmvideocdn.streaming.mediaservices.windows.net/fbbcda92-5518-4b65-a0b5-ec3f1a18
b81e/_prores_out.ism/Manifest(format=m3u8-aapl,audio-only=false,filter=preset2)&token=Bearer=eyJ0eXAiOiJKV1QiLCJh
bGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDE
tODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI
6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on 'https://blah.com/video/mnffsnd?manifest=https%3a%2f%2fwmvideocdn.st
reaming.mediaservices.windows.net%2ffbbcda92-5518-4b65-a0b5-ec3f1a18b81e%_prores_out.ism/QualityLevels(1465184)
/Manifest(video,format=m3u8-aapl,filter=preset2)&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJl
Om1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZF
IiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0E
i6YC8Zul-WyjaYipqIHevyc-lH7m_sFhte_uPc'
[download] Destination: mnff-mnffmanifest=https -__wmvideocdn.streaming.mediaservices.windows.net_fbbcda92-5518
-4b65-a0b5-ec3f1a18b81e__prores_out.ism_Manifest(format=m3u8-aapl,audio-only=false,filter=preset2)&token=Bearer=e
yJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1
ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2Fr
YW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.f1644.mp4
[debug] ffmpeg command line: ffmpeg -y -loglevel verbose -headers "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Cookie: ai_user=DYSPI|2017-10-17T20:40:48.829Z; WMV2Consent=true; ; ASP.NET_SessionId=iqpx4vtkyw1pa5rn
lkyjxmnt; =; .Auth=ZclG-YhW_wYUTZtXSV4ss2XGhyeMVI-eKydZH0Ed5bqg-ctn4o_r_EHxrjyMT2HuLnC1Qp-sgCbDO
x-iDFy8El8Cs_5r6SbuoF2zYZpfGDDJ5cl9mzdtjfG9WLhJYAtY8e3e4NuQikVALUyCvarLxYj61N80J4bJ37xtpB7kzxj_9g3CNMoXH78K1HfOdTpZk4qXQ
0YvHujCwuuSVNz_2dLC0vlDpV_NM9Ykf29yil05clVJw607vYfY7j6LfdEexEIf0kvO12LAHcjB0tOWOHv8xS3VmhmKIqnBTof8KaGO6dyBuVFyXUVfzR1xx
_OAWLSFCNxHuZG2h193dNpOPMFmqdkQyG6j7xclWdH2OgOFBd3FZXBq3EHsoyyxNZ8Q7ixfWMuoNkwChWL8dcKb9Lhx0WEvbOXvl-XcwEnPAmwTbAWUsvmuk
VfFY1D9p_7cVgPcuIssPyDXwUBQLgz0PYvgEdpWfPGceyalHygQH7pPSoWKQuRzcjFSOitE1l4f1u8Rl859TYAbRWhJIxiPIDwbKlk_jPRFEJlEUehVBKpVg
ElsdoaWMqcr4jRGabIhEHfSxKdurS5rjVSEcejxDg; _ga=GA1.2.183824678.1508272849; _gid=GA1.2.1732356944.1508272849
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20150101 Firefox/47.0 (Chrome)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
" -i "https://blah.com/video/mnffsnd?manifest=https%3a%2f%2fwmvideocdn.streaming.mediaservices.wind
ows.net%2ffbbcda92-5518-4b65-a0b5-ec3f1a18b81e%_prores_out.ism/QualityLevels(1465184)/Manifest(video,format=m3u
8-aapl,filter=preset2)&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udG
VudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UVi
IsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0Ei6YC8Zul-WyjaYipqIHevyc-lH
7m_sFhte_uPc" -c copy -f mp4 "file:mnff-mnffmanifest=https -__wmvideocdn.streaming.mediaservices.windows.net_fb
bcda92-5518-4b65-a0b5-ec3f1a18b81e__prores_out.ism_Manifest(format=m3u8-aapl,audio-only=false,filter=preset2)&tok
en=Bearer=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZ
XIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6L
y93d3cud2FrYW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.f1644.mp4.part"
ffmpeg version N-87871-g7480f232d2 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enabl
e-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopu
s --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-z
lib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --e
nable-dxva2 --enable-avisynth --enable-libmfx
  libavutil      55. 79.100 / 55. 79.100
  libavcodec     57.108.100 / 57.108.100
  libavformat    57. 84.100 / 57. 84.100
  libavdevice    57. 11.100 / 57. 11.100
  libavfilter     6.108.100 /  6.108.100
  libswscale      4.  9.100 /  4.  9.100
  libswresample   2. 10.100 /  2. 10.100
  libpostproc    54.  8.100 / 54.  8.100
[hls,applehttp @ 00000000004cc6c0] HLS request for url 'https://wmvideocdn.streaming.mediaservices.windows.net/
fbbcda92-5518-4b65-a0b5-ec3f1a18b81e/_prores_out.ism/QualityLevels(1465184)/Fragments(video=0,format=m3u8-aapl)',
 offset 0, playlist 0
[hls,applehttp @ 00000000004cc6c0] Opening 'https://blah.com/video/key?KID=9c55d229-1e39-4541-84b6-ed644276b
ee9&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZ
XIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6L
y93d3cud2FrYW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0Ei6YC8Zul-WyjaYipqIHevyc-lH7m_sFhte_uPc' for r
eading
[hls,applehttp @ 00000000004cc6c0] Opening 'crypto+https://wmvideocdn.streaming.mediaservices.windows.net/fbbcd
a92-5518-4b65-a0b5-ec3f1a18b81e/_prores_out.ism/QualityLevels(1465184)/Fragments(video=0,format=m3u8-aapl)' for r
eading
[h264 @ 000000000058a7a0] Reinit context to 960x544, pix_fmt: yuv420p
[hls,applehttp @ 00000000004cc6c0] max_analyze_duration 5000000 reached at 5005000 microseconds st:0
Input #0, hls,applehttp, from 'https://blah.com/video/mnffsnd?manifest=https%3a%2f%2fwmvideocdn.str
eaming.mediaservices.windows.net%2ffbbcda92-5518-4b65-a0b5-ec3f1a18b81e_prores_out.ism/QualityLevels(1465184)/
Manifest(video,format=m3u8-aapl,filter=preset2)&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlO
m1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDEtODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFI
iwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.weq0Ei
6YC8Zul-WyjaYipqIHevyc-lH7m_sFhte_uPc':
  Duration: 00:23:03.34, start: 0.083411, bitrate: 0 kb/s
  Program 0
    Metadata:
      variant_bitrate : 0
    Stream #0:0: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(left), 960x540 (960x544) [SAR 1
:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
    Metadata:
      variant_bitrate : 0
file:mnff-mnffmanifest=https -__wmvideocdn.streaming.mediaservices.windows.net_fbbcda92-5518-4b65-a0b5-ec3f1a18
b81e__prores_out.ism_Manifest(format=m3u8-aapl,audio-only=false,filter=preset2)&token=Bearer=eyJ0eXAiOiJKV1QiLCJh
bGciOiJIUzI1NiJ9.eyJ1cm46bWljcm9zb2Z0OmF6dXJlOm1lZGlhc2VydmljZXM6Y29udGVudGtleWlkZW50aWZpZXIiOiI5YzU1ZDIyOS0xZTM5LTQ1NDE
tODRiNi1lZDY0NDI3NmJlZTkiLCJDS1R5cGUiOiJFTlZFIiwiaXNzIjoiV2FrYW5pbS5UViIsImF1ZCI6Imh0dHA6Ly93d3cud2FrYW5pbS50diIsImV4cCI
6MTUwODM2MDc0OCwibmJmIjoxNTA4Mjc2NDQ4fQ.f1644.mp4.part: No such file or directory

ERROR: ffmpeg exited with code 1
  File "__main__.py", line 19, in <module>
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\__init__.py", line 465, i
n main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\__init__.py", line 455, i
n _real_main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 1985,
 in download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 795,
in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 849,
in process_ie_result
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 1619,
 in process_video_result
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 1886,
 in process_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 1831,
 in dl
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\downloader\common.py", li
ne 361, in download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\downloader\external.py",
line 57, in real_download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\downloader\common.py", li
ne 163, in report_error
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 612,
in report_error
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmplnz97faa\build\youtube_dl\YoutubeDL.py", line 574,
in trouble
<end of log>

Description of your issue, suggested solution and other information

I was trying to download a video from an M3U8. Everything was going fine until FFMPEG suddenly quits saying "No such file or directory".

Turns out, the output filename Youtube-DL was feeding FFMPEG was bad, causing FFMPEG to quit. The simple solution is to use the -o flag on Youtube-DL to specify an output name. Though ideally, Youtube-DL shouldn't be outputting bad filenames to begin with.

ytdl-org / youtube-dl