Shotcut creates the proxy it has audio but no video.
Shotcut Version 20.11.28
ffmpeg version n4.2.4-7-gc9f3835b2b Copyright © 2000-2020 the FFmpeg developers
built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
configuration: --prefix=/d/a/shotcut/shotcut/build/Shotcut --disable-static --disable-doc --enable-gpl --enable-version3 --enable-shared --enable-runtime-cpudetect --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libvpx --enable-libopus --enable-libmfx
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000016bb141b400] CTTS invalid
[h264 @ 0000016bb1304ec0] Reinit context to 1280x720, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ‘C:/Users/jason/Downloads/Shotcut/01.mp4’:
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:03:57.27, start: 0.000000, bitrate: 4088 kb/s
Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, left), 1280x720 [SAR 1:1 DAR 16:9], 3827 kb/s, 23.98 fps, 23.98 tbr, 1494720000.00 tbn, 47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
Press [q] to stop, [?] for help
[h264 @ 0000016bb138bc80] Reinit context to 1280x720, pix_fmt: yuv420p
[graph_1_in_0_1 @ 0000016bb1353b40] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[Parsed_scale_1 @ 0000016bb2e4c080] w:-2 h:360 flags:‘bicubic’ interl:0
[graph 0 input from stream 0:0 @ 0000016bb3a68fc0] w:1280 h:720 pixfmt:yuv420p tb:1/1494720000 fr:1494720000/62342279 sar:1/1 sws_param:flags=2
[Parsed_scale_1 @ 0000016bb2e4c080] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:640 h:360 fmt:yuv420p sar:1/1 flags:0x4
[libx264 @ 0000016bb2e6e580] using SAR=1/1
[libx264 @ 0000016bb2e6e580] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000016bb2e6e580] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0000016bb2e6e580] 264 - core 159 r2991M 1771b55 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=1 keyint_min=1 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to ‘C:/Users/jason/Downloads/Shotcut/Proxies/5217263a5fad43900d15295c2f2b6d3b.pending.mp4’:
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Stream #0:0(und): Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, left), 640x360 [SAR 1:1 DAR 16:9], q=-1–1, 23.98 fps, 1494720000.00 tbn, 23.98 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc58.54.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo, fltp, delay 256, 256 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc58.54.100 ac3
*** dropping frame 0 from stream 0 at ts -9223372036854775808
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No more output streams to write to, finishing.
video:0kB audio:7414kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009826%
Input file #0 (C:/Users/jason/Downloads/Shotcut/01.mp4):
Input stream #0:0 (video): 5688 packets read (113498497 bytes); 5686 frames decoded;
Input stream #0:1 (audio): 11122 packets read (7605988 bytes); 11121 frames decoded (11387904 samples);
Total: 16810 packets (121104485 bytes) demuxed
Output file #0 (C:/Users/jason/Downloads/Shotcut/Proxies/5217263a5fad43900d15295c2f2b6d3b.pending.mp4):
Output stream #0:0 (video): 0 frames encoded; 0 packets muxed (0 bytes);
Output stream #0:1 (audio): 7414 frames encoded (11387904 samples); 7414 packets muxed (7591936 bytes);
Total: 7414 packets (7591936 bytes) muxed
[AVIOContext @ 0000016bb138b500] Statistics: 2 seeks, 32 writeouts
[AVIOContext @ 0000016bb12fc040] Statistics: 121256860 bytes read, 1 seeks
Completed successfully in 00:00:24