mjpeg proxies

[farid abdelnour]

hi

so at the last café we discussed testing new profiles for creating proxies
which are frame accurate for seeking.

i am testing this line which vpinon shared:


-vf scale=1024:-1 -qscale 3 -ab 128k -vcodec mjpeg -acodec pcm_s16le

but i get an error:
==============================================================

ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers

built with gcc 7.2.0 (GCC)

configuration: --prefix=/usr --disable-debug --disable-static
--disable-stripping --enable-avisynth --enable-avresample
--enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl
--enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype
--enable-libfribidi --enable-libgsm --enable-libiec61883
--enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb
--enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus
--enable-libpulse --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid
--enable-shared --enable-version3

libavutil 55. 58.100 / 55. 58.100

libavcodec 57. 89.100 / 57. 89.100

libavformat 57. 71.100 / 57. 71.100

libavdevice 57. 6.100 / 57. 6.100

libavfilter 6. 82.100 / 6. 82.100

libavresample 3. 5. 0 / 3. 5. 0

libswscale 4. 6.100 / 4. 6.100

libswresample 2. 7.100 / 2. 7.100

libpostproc 54. 5.100 / 54. 5.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'/home/farid/Gunga/Juvelinas/Render/Alvenaria.mp4':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

encoder : Lavf57.71.100

Duration: 00:01:23.65, start: 0.000000, bitrate: 13459 kb/s

Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv,
bt709/unknown/bt709), 1920x1080 [SAR 1:1 DAR 16:9], 13266 kb/s, 23.98 fps,
23.98 tbr, 24k tbn, 47.95 tbc (default)

Metadata:

handler_name : VideoHandler

Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 191 kb/s (default)

Metadata:

handler_name : SoundHandler

Please use -q:a or -q:v, -qscale is ambiguous

[NULL @ 0x55e271813420] Unable to find a suitable output format for
'/home/farid/.cache/kdenlive/proxy/3c319b73214ec001cef8e184020f0062.mov

'

/home/farid/.cache/kdenlive/proxy/3c319b73214ec001cef8e184020f0062.mov

: Invalid argument

=======================================================


also, any one interested in helping to test this?




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