After processing 2/3 frames I am always getting an error with corrupted output

[Smithangshu]

Hi @Kagami

I am trying to use like following in order to convert webm to mp4.

const worker = new Worker("js/ffmpeg-worker-mp4.js"); worker.onmessage = function (e) { const msg = e.data; switch (msg.type) { case "ready": var testData = new Uint8Array(d); worker.postMessage({ type: "run", TOTAL_MEMORY: 256 * 1024 * 1024, MEMFS: [{ name: "test.webm", data: testData }], arguments: ["-i", "test.webm", "-c:v", "libx264", "-vf", "scale='bitand(oh*dar,65534)':'min(720,ih)'", "out.mp4"] }); break; case "stdout": console.log(msg.data); break; case "stderr": console.log(msg.data); break; case "done": console.log(msg.data); var data = msg.data.MEMFS[0].data; var url = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' })); var video = $('#video')[0]; video.src = url; video.oncanplaythrough = function () { video.play(); }; break; case "exit": break; } };

But ending up with following error

frame= 2 fps=1.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x frame= 3 fps=1.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x frame= 3 fps=0.8 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x OOM OOM exception thrown: Error: abort(OOM). Build with -s ASSERTIONS=1 for more info.,Error: abort(OOM). Build with -s ASSERTIONS=1 for more info. at C (http://localhost:27963/js/ffmpeg-worker-mp4.js:7:215) at C (http://localhost:27963/js/ffmpeg-worker-mp4.js:16:97) at emscripten_resize_heap (http://localhost:27963/js/ffmpeg-worker-mp4.js:219:528) at esa (http://localhost:27963/js/ffmpeg-worker-mp4.js:119:149230) at Xra (http://localhost:27963/js/ffmpeg-worker-mp4.js:43:527368) at bsa (http://localhost:27963/js/ffmpeg-worker-mp4.js:99:197847) at asa (http://localhost:27963/js/ffmpeg-worker-mp4.js:123:12975) at Zfa (http://localhost:27963/js/ffmpeg-worker-mp4.js:115:1623) at nka (http://localhost:27963/js/ffmpeg-worker-mp4.js:47:292472) at Array.kpa (http://localhost:27963/js/ffmpeg-worker-mp4.js:27:1162)

I am trying with Chrome for Android.
Please help me to solve the issue.

[Kagami]

Try -preset ultrafast option (add to arguments).

[tpetry]

Encoding for the baseline profile may help too as much less optimizations are done so less memory consumed.

[Smithangshu]

Thanks! It worked but its too slow..It took 20 mins to convert 5 seconds video. Is there any solution for that? Basically my scenario is to record video with MediaRecorder API then convert it to MP4. Can you please provide me with any solution for that?

[Smithangshu]

Encoding for the baseline profile may help too as much less optimizations are done so less memory consumed.

Are you suggesting me to add this -profile:v baseline?

[Kagami]

Is there any solution for that

#10 #65 #95

[tpetry]

I would also guess your scale filter is too memory intensive. I dont know what it does, but its not a normale scale filter.

[Kagami]

Issue for OOM is here: #83