[Bug]: ffmpeg mediacodec decoder outputs wrong dimensions

[urain39]

Problem description

This bug may cause ffmpeg to fail to perform hardware-accelerated decoding of the input video during the conversion operation.

Command:

ffmpeg -v verbose -hwaccel mediacodec -i Video_01.mp4 -f null -

Output:

[h264 @ 0xb400007811282a80] Reinit context to 832x1280, pix_fmt: yuv420p
Selecting decoder 'h264_mediacodec' because of requested hwaccel method mediacodec
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Video_01.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    description     : Tencent CAPD MTS (T-tech)
  Duration: 00:00:05.10, start: 0.000000, bitrate: 2015 kb/s
  Stream #0:0[0x1](und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, progressive, left), 832x1280, 2011 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
[out#0/null @ 0xb40000781127ccc0] No explicit maps, mapping streams automatically...
[vost#0:0/wrapped_avframe @ 0xb40000781138e000] Created video stream from input stream 0:0
[h264_mediacodec @ 0xb400007811283500] Both surface and native_window are NULL
[h264_mediacodec @ 0xb400007811283500] Using surface 0x0
[h264_mediacodec @ 0xb400007811283500] No Java virtual machine has been registered
[h264_mediacodec @ 0xb400007811283500] Failed to getCodecNameByType
[h264_mediacodec @ 0xb400007811283500] Output crop parameters top=0 bottom=238 left=0 right=318, resulting dimensions width=319 height=239
[h264_mediacodec @ 0xb400007811283500] MediaCodec started successfully: codec = c2.mtk.avc.decoder, ret = 0
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (h264_mediacodec) -> wrapped_avframe (native))
[vost#0:0/wrapped_avframe @ 0xb40000781138e000] Starting thread...
[vf#0:0 @ 0xb4000078113701a0] Starting thread...
[vist#0:0/h264 @ 0xb40000781127f900] [dec:h264_mediacodec @ 0xb4000078113408c0] Starting thread...
[in#0/mov,mp4,m4a,3gp,3g2,mj2 @ 0xb4000078112fc900] Starting thread...
Press [q] to stop, [?] for help
[h264_mediacodec @ 0xb400007811283500] Output MediaFormat changed to android._color-format: int32(2135033992), android._video-scaling: int32(1), sar-width: int32(1), color-standard: int32(1), color-range: int32(2), color-transfer: int32(3), android._dataspace: int32(260), width: int32(832), rotation-degrees: int32(0), sar-height: int32(1), max-width: int32(832), max-height: int32(1280), priority: int32(-1), mime: string(video/raw), crop: Rect(0, 0, 831, 1279), hdr-static-info: data, frame-rate: int32(30), height: int32(1280), color-format: int32(19), image-data: data, stride: int32(832), slice-height: int32(1280)}
[h264_mediacodec @ 0xb400007811283500] Output crop parameters top=0 bottom=238 left=0 right=318, resulting dimensions width=319 height=239
[graph -1 input from stream 0:0 @ 0xb400007718c3a180] w:319 h:239 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1 csp:bt709 range:tv
[graph -1 input from stream 0:0 @ 0xb400007718c3a180] video frame properties congruent with link at pts_time: 0

What steps will reproduce the bug?

See the command above.

What is the expected behavior?

Output should be like:

[h264 @ 0xb400007915f23a80] Reinit context to 832x1280, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Video_01.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    description     : Tencent CAPD MTS (T-tech)
  Duration: 00:00:05.10, start: 0.000000, bitrate: 2015 kb/s
  Stream #0:0[0x1](und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, progressive, left), 832x1280, 2011 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
[out#0/null @ 0xb400007915f1dcc0] No explicit maps, mapping streams automatically...
[vost#0:0/wrapped_avframe @ 0xb40000791602e000] Created video stream from input stream 0:0
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
[vost#0:0/wrapped_avframe @ 0xb40000791602e000] Starting thread...
[vf#0:0 @ 0xb4000079160111a0] Starting thread...
[vist#0:0/h264 @ 0xb400007915f20900] [dec:h264 @ 0xb400007915fe18c0] Starting thread...
[in#0/mov,mp4,m4a,3gp,3g2,mj2 @ 0xb400007915f9d900] Starting thread...
Press [q] to stop, [?] for help
[h264 @ 0xb400007915f24880] Reinit context to 832x1280, pix_fmt: yuv420p
[graph -1 input from stream 0:0 @ 0xb400007827cfc0c0] w:832 h:1280 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1 csp:bt709 range:tv
[graph -1 input from stream 0:0 @ 0xb400007827cfc0c0] video frame properties congruent with link at pts_time: 0

^^^ Generated by command:

ffmpeg -v verbose -i Video_01.mp4 -f null -

Main diff:

< [graph -1 input from stream 0:0 @ 0xb400007718c3a180] w:319 h:239 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1 csp:bt709 range:tv
---
> [graph -1 input from stream 0:0 @ 0xb400007827cfc0c0] w:832 h:1280 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1 csp:bt709 range:tv

See also: Can AVCodec provide more crop information when decoding via MediaCodec?

System information

Termux Variables:
TERMUX_APK_RELEASE=GITHUB
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=20916
TERMUX_IS_DEBUGGABLE_BUILD=1
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.0
TERMUX__USER_ID=0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://mirrors.zju.edu.cn/termux/apt/termux-main stable main
# root-repo (sources.list.d/root.list)
deb https://mirrors.zju.edu.cn/termux/apt/termux-root root stable
# tur-repo (sources.list.d/tur.list)
deb https://tur.kcubeterm.com tur-packages tur tur-on-device tur-continuous
Updatable packages:
All packages up to date
termux-tools version:
1.44.6
Android version:
14
Kernel build information:
Linux localhost 5.10.209-android12-9-00019-g4ea09a298bb4-ab12292661 #1 SMP PREEMPT Wed Aug 28 22:16:09 UTC 2024 aarch64 Android
Device manufacturer:
Xiaomi
Device model:
22041216C
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so

[Biswa96]

There are some issues with mediacodec https://github.com/termux/termux-packages/issues?q=mediacodec%20%20